100 Half Marathons Club

Guide to Walker, Slow Runner and Back-of-the-Pack Friendly Half Marathons

NOTE: This list is provided for informational purposes only as a resource for slower runners and race walkers to find races with welcoming time limits.  These are the races historically known for being welcoming to athletes of all paces.  This list is not an endorsement of any specific race. 

The information was gathered by athlete submissions and by the information on the races' websites.  We have tried to include every race we can based on the information on a race's website, and the suggestions of past participants.  All information is subject to change- check the race website before registering to see if time limits have changed.  No race directors paid us to be on this list. 

If you know of a race that should be added to this list, if a correction is needed, or if a race should be removed, please let us know here. Please provide the race name, website, state and published time limit or specific race information.

The criteria to be listed: walker-friendly time limit (3:30 or more) and/or walkers and slower runners are offered an early start; finishers get a recorded race time; aide stations, course volunteers/marshals and course direction signs are not taken down early; course time limit information must be on the race website.  If there is no time limit information clearly listed on your website, we will not list your event. 

Website update: 1/28/2017





National Race Series or Multi-Race Events  
These race organizers offer half marathons in several states (or offer several races in the same area) that are walker-friendly.
Race Name Race Website Published Time Limit and Special Info
Mainly Marathons (Nationwide) http://www.mainlymarathons.com No runner left behind; no time limits; full marathon held with each half.   Races are held in 40+ states.
Race 13.1 Series (southeast) http://www.race131.com 3:30 time limit at all races with sweeper support at all races. 
Biggest Loser Half Marathon Series (Nationwide) http://www.biggestloserraceseries.com/ Generally 5 hour time limits for the half marathon
Rock 'n' Roll Series (Competitor Group) http://runrocknroll.competitor.com/ Most half marathons have either a 3:30 or 4:00 time limit
Divas Half Marathon Series (Nationwide) http://www.runlikeadiva.com/ 3:30 hours for all races except Puerto Rico, which has a 4:00 hour limit; Men are not eligible for awards and no mens/unisex fit shirts are available
RunDisney Half Marathons (California and Florida) http://www.rundisney.com RunDisney half marathons offer a 3:30 time limit from the last corral.   If you are in the later/last corrals this is a hard-sweep time limit.
Texas Wine Series (Texas) http://www.texaswineseries.com/ Five hour time limit for their half marathons.
Beat The Blerch Half Marathons (multiple states) http://www.beattheblerch.com/ 7-hour cutoff applies to all lengths of race (some have a full with the half)
A Better World Running (California) http://www.abetterworldrunning.com/ Offers several races throughout southern CA that are walker friendly. "For the half marathon if there is no marathon that day, approximately 3-3.5 hours.   An early start is always an option."
Best Damn Race Series (Florida) http://bestdamnrace.com/ 3:30 time limit for all races except Cape Coral, which has a 6:30 time limit with a concurrent full marathon
Go Girl Run Half Marathon Series (Missouri, Kansas, Oklahoma) http://ultramaxsports.com/gogirlrun/gogirlrun_landing/gogirlrun_landing.html Extended finish time limit for walkers.   Course open for 5.5 hours.   
Elite Sports California http://www.elitesportsca.com/ Check individual races for time limits. Most halfs are a 4 hour time limit.
Brazen Racing (California) http://www.brazenracing.com Average 4 hour time limit. Some races are trail races.   
Individual Races By State    
Alabama    
Race Name Race Website Published Time Limit and Special Info
First Light Half Marathon http://www.firstlightmarathon.com/ Course remains open for 7 hours
Mercedes Half Marathon http://www.mercedesmarathon.com/half-marathon.php 4:00 time limit
Running the Shoals Half Marathon http://runningtheshoals.itsyourrace.com/event.aspx?id=1703 7 hours for the half and full
Tuscaloosa Half Marathon www.tuscaloosahalfmarathon.org 4:00 time limit
Bridgestreet Town Centre Half Marathon http://www.bridgestreethalfmarathon.com 4:00 time limit
Alaska    
Race Name Race Website Published Time Limit and Special Info
Mayor's Midnight Sun Half Marathon http://skinnyraven.com/races/her-tern/ Official early start, 1 hour prior to runner start. No cut-off time for participants starting in the early wave.
Her Tern Half Marathon http://www.goseawolves.com/ViewArticle.dbml?DB_OEM_ID=13400&ATCLID=209224468 Offered with full which has an 8 hour time limit. Walkers are welcomed on the website.
Arizona    
Race Name Race Website Published Time Limit and Special Info
Lost Dutchman Half Marathon http://www.lostdutchmanmarathon.org/ Walkers are welcomed in the half marathon.   The full marathon has a 6:30 time limit.
Phoenix Half Marathon http://thephoenixmarathon.com/ Per their website- the half course is open for the full 6 hours that the full marathon course is open
Sedona Half Marathon http://www.sedonamarathon.com/ Walkers are welcomed in the FAQ's.   Full marathon offered w/ same finish
Arkansas    
Race Name Race Website Published Time Limit and Special Info
Team Loco Half Marathon http://www.teamloco.org/loco.htm Results show 4+ hours for the half and 6+ hours for the full. 
Little Rock Half Marathon http://littlerockmarathon.com/half-marathon/ 4 hour time limit
California    
Race Name Race Website Published Time Limit and Special Info
Long Beach Half Marathon http://www.runlongbeach.com/ 6 hours
Avenue of the Giants Half Marathon http://www.theave.org/ 6 hours
Clo-Cow Half Marathon http://www.clocowhalf.com/ 4 hours
Surgical Artistry Modesto   Half Marathon http://modestomarathon.com/ 7 hours (same time limit as the full)
City of Laguna Hills Memorial Day Half Marathon http://www.lagunahillshalfmarathon.com/ 4 hours
Humbolt Redwoods Half Marathon http://www.redwoodsmarathon.org Time limit is 22:54 per mile
The Lucky Run http://changeofpace.com/lucky-run/ 4 hours
Humboldt Bay Half Marathon http://humboldtbaymarathon.com/ 4.5 hours
Surf City Half Marathon http://www.runsurfcity.com/ "The course time limit is approximately 5 - 5.5 hours - must finish by 1:30 p.m. regardless of wave start time."
Davis Moonlight Race http://changeofpace.com/davis-moonlight-race/ 4 hours
Davis Turkey Trot http://changeofpace.com/davis-turkey-trot/ 4 hours
Colorado    
Race Name Race Website Published Time Limit and Special Info
DreamCatcher Half Marathon www.starunnerenterprises.com 6 hours, staggered starts (7 am for greater than 4 hour expected finish, last at 9 am for faster than 2 hour finish)
Moonlight Miles Half Marathon www.starunnerenterprises.com 5 hours
Run Through Time Trail Half Marathon 
http://www.salidarec.com/ccrc/Run-Through-Time-Marathon.htm Trail race.   6 hours.
Sand Creek Half Marathon http://www.featonthestreet.com/EventInformation.asp?eID=12800 4 hours
Race for Open Space http://raceforopenspace.org/ 4 hours
Ralston Creek Half Marathon http://www.racingunderground.com/RalstonCreekHalf/ Early start wave for those planning to take longer than 2:30
Slacker Half Marathon http://www.slackerhalfmarathon.com/index.html "We don't have a time limit on the course and we keep water stations open until the last racer crosses the finish line!"
Colfax Half Marathon 
http://www.runcolfax.org/half-marathon/ 4 hour time limit
Three Creeks Half Marathon http://www.racingunderground.com/threecreeks/#info Offers different wave starts based on your expected finish time.   Finish line closes at 4:15 from early start
Connecticut    
Race Name Race Website Published Time Limit and Special Info
Savin Rock Half Marathon http://www.shorelinesharks.com/ 3:30 time limit
Harvard Pilgrim Middletown Half Marathon http://www.hartfordmarathon.com/Events/Harvard_Pilgrim_Middletown_Half___Legends_4-Mile.htm 3:30 time limit. Note- if you go over this time limit, they may remove your bib from you while you are still on the course.
Hamden Hills Half Marathon http://www.shorelinesharks.com/ 3:30 time limit
Gulf Beach Half Marathon http://www.shorelinesharks.com/ 3:30 time limit
Hogsback Half Marathon http://www.hogsbackhalfmarathon.com/ Offers early start
Delaware    
Race Name Race Website Published Time Limit and Special Info
Reheboth Beach Half Marathon http://www.rbmarathon.com/ Per website- the 7 hour time limit that applies to the marathon also applies to the half
Delaware Half Marathon http://www.delawaremarathon.org/ Half marathoners get the same 6 hours the full marathoners have for a time limit
Caesar Rodney Half Marathon http://action.lung.org/site/TR?fr_id=13470&pg=entry In 2015 the race changed its time limit to 4 hours.
Monster Dash Half Marathon http://www.monstermashmarathon.com/ Offers full with the half- results show half marathon finishers up to 5 hours
Florida    
Race Name Race Website Published Time Limit and Special Info
Publix Melbourne Music Half Marathon http://www.themelbournemarathon.com/ 6 hours (same as marathon)
Suncoast Half Marathon http://activesuncoast.org/Suncoast_Half_Marathon.html From the race organizer: "We have a 3  ½ hour time limit, support and encourage walking participants.   We have a 3 hour pacer and our Balloon Lady who walks at the 3  ½ hour pace and provides encouragement to the participants to maintain that pace.   We maintain all 7 aid stations until the Balloon Lady passes each station so full support for those at the 3  ½ hour pace.   Our 10 mile aid station will provide participants with a bottle of water and instructions to use the sidewalks if they have fallen behind the 3  ½ hour pace."
26.2 With Donna- Half Marathon http://breastcancermarathon.com/ 7 hours   "The course will be open for 7 hours, allowing for a 16-minute per mile marathon and marathon relay, or a 32-minute per mile half marathon pace."
Florida Beach Halfathon http://www.floridabeachhalfathon.com/ "There is no time limit since these races are being staged on recreational trails and access roads with minimal vehicular traffic. Regardless of when you finish, we will be there awaiting your arrival."
Florida Halloween Halfathon http://www.floridahalloweenhalfathon.com/ "There is no time limit since these races are being staged on recreational trails and access roads with minimal vehicular traffic. Regardless of when you finish, we will be there awaiting your arrival."
Florida Holiday Halfathon http://www.floridaholidayhalfathon.com/ Walkers expecting to finish slower than 3 hours will be required to start 30 minutes earlier, at 7:05 am.
Spring Hill Marathon Mania http://marathonmania.net Per the RD- no time limit for the half marathon.
Clearwater Distance Classic http://www.clearwaterdistanceclassic.com/ Walkers anticipating a finish time beyond 3 hours MUST start early at 6:35 a.m., which increases total finish time to 3.5 hours.
Fort Lauderdale A1A Half Marathon http://www.a1amarathon.com/ 6 hours
Space Coast Half Marathon www.spacecoastmarathon.com/ Course closes in 7 hours (same amount for full marathon)
Paradise Coast Half Marathon http://www.naplesmarathon.com/ 6 hours (same as marathon)
Joseph Schiro Memorial Run www.JosephSchiroMemorialRun.org Untimed event with multiple distances to choose from, including half marathon.   
St. Augustine Half Marathon http://staugustinemarathon.com/ 3:30 time limit
Running for the Bay http://www.Runningforthebay.com All races have an 8 hour time limit
Ladies First Half Marathon http://www.mydestinationtraining.com/ 4:30 time limit for the half, men not eligible for awards but can run
Georgia    
Race Name Race Website Published Time Limit and Special Info
Soldier Half Marathon http://www.soldiermarathon.com/ "There is a time limit of 7 hours to finish the Soldier Marathon and Half Marathon"
Georgia Half Marathon http://www.georgiamarathon.com/ 4 hours (18 min/mile)
Run for God Run at the Mill http://www.runforgod.com/events_runatthemill No time limit.   Awards are given after the last finisher so that everyone is able to take part
Jeff Galloway 13.1 http://www.Jeffgalloway131.com 4 hour time limit.
Hawaii    
Race Name Race Website Published Time Limit and Special Info
Hapalua Half Marathon http://thehapalua.com/ No time limit- finish line open until the last finisher comes in
Kona Half Marathon http://konamarathon.com/ 8 hour time limit (finish line open until 2 pm for marathon)
Maui Half Marathon http://www.mauimarathonhawaii.com/ 6 hour time limit (runs alongside marathon, but half marathon has a different start location than the full). 
Idaho    
No races provided yet.

Illinois    
Race Name Race Website Published Time Limit and Special Info
Des Plaines River Trail 
http://www.desplainesrivertrailraces.com/ Same as for the 50-mile race, 6:30 PM which is 9.5 hours after the half marathon starts at 9 AM. This is a trail race, with most of the course on crushed limestone path.
F^3 Lake Half Marathon http://www.f3running.com/ 16 minute mile pace requirement (3:30 time limit)
Chicagoland Spring Half Marathon http://allcommunityevents.com/chicagoland_spring_marathon/chicagoland_marathon_home.html Same course limit time as marathon: 6 hours and 5 minutes.
Rockford Half Marathon http://www.chicagoevents.com/event.cfm?eid=158 6 hours
Indiana    
Race Name Race Website Published Time Limit and Special Info
Indy Women's Half Marathon www.IndyWomensHalfMarathon.com 4:30 time limit
Carmel Half Marathon http://www.carmelmarathon.com/pages/half-marathon-information 4 hours
Iowa    
Race Name Race Website Published Time Limit and Special Info
Des Moines Half Marathon http://www.desmoinesmarathon.com/ "Both the Marathon and Half Marathon courses are open for 7 hours"
Kansas    
Race Name Race Website Published Time Limit and Special Info
Pilgrim Pacer Run http://www.psychowyco.com/pilgrimpacerrun/index.html 7 hour time limit for full and half marathon
Eisenhower Half Marathon http://www.eisenhowermarathon.com/index.htm 6 hrs- Traffic is detoured from 7 am start until 1 pm (not recommended to continue after that)
Kentucky    
Race Name Race Website Published Time Limit and Special Info
Iron Mom Half Marathon (Paducah) http://paducahironmom.com/ There is a four hour course limit but course support stops at 3:30 hrs
Horse Capital Half Marathon http://horsecapitalmarathon.com/ 6 hours 15 minute time limit
White Lightning Half Marathon http://www.whitelightninghalfmarathon.com/ 5 hour time limit
Kentucky Derby Festival Mini Marathon http://derbyfestivalmarathon.com/ 4 hours for the half marathon
Run the Bluegrass Half Marathon http://www.runthebluegrass.org/ 3:30 time limit
Hatfield & McCoy Half Marathon http://www.hatfieldmccoymarathon.net/ No time limit* Note- they have two half marathons (full course split). One starts in KY the other in WV.
Louisiana    
Race Name Race Website Published Time Limit and Special Info
Jazz Half Marathon http://jazzhalf.com/ 4 hours
Ole Man River Half Marathon http://www.runnotc.org/races/2014/olemanriver.shtml 30 minute mandatory early start for walkers (7:30 a.m.). Course closes at 11:50 a.m.
Baton Rouge Beach Half Marathon http://www.brbeachmarathon.com/ "There is no time limit on the half-marathon but the full marathon is six hours."
Dirty South Half Marathon http://marathon.dirtysouthrunning.com/ 4 hours
Cajun Country Half Marathon http://latrail.org/web/trail-events-2/cajun-country-12-marathon/ Not published, but "Walkers are encouraged to participate"
Log Jammer Half Marathon http://www.sportspectrumusa.com/events/the-log-jammer-half-marathon/ 4 hours
Maine    
Race Name Race Website Published Time Limit and Special Info
Maine Half Marathon http://mainemarathon.com/ Walkers are welcomed in the half marathon. The half and full share the same finish line.   Published 4 hour time limit but people have passed that with no problem.
Moose Pond Half Marathon www.moosepondhalf.com Per race director- the finish line is kept open until the last person finishes.
Maryland    
Race Name Race Website Published Time Limit and Special Info
B & A Trail Marathon http://annapolisstriders.org/2015/BAMarathon.pdf 6 hours with full marathon going on at same time.
Wilson Bridge Half Marathon http://wilsonbridgehalf.com/ "Runners must be able to run the first 8 miles in 120 minutes or 15:00 pace. The finish line will remain open for four hours after the 7 a.m. start time."
Baltimore Running Festival http://www.thebaltimoremarathon.com/ 5 hours for half marathon
Frederick Running Festival http://www.frederickrunfest.com/ 3:30 time limit
Maryland Trail Running Festival Half Marathon http://www.wdas.org/#!mtrf/c66t Trail race. Half marathoners have the same amount of time as full marathoners. 7 hours
Massachusetts    
Race Name Race Website Published Time Limit and Special Info
Western Mass Mother's Day Half Marathon http://racewmass.com/ Time limit is 4 hours- walkers have an early start
Baystate Half Marathon http://baystatemarathon.com/raceinfo/ Course is maintained for a 6 hour marathon running time (full is a double loop of half)
Worcester Running Festival Half Marathon http://www.runworcester.com/ 3:30 time limit
Hyannis Half Marathon http://hyannismarathon.com/ 6 hours (full is double loop of half and they share the same finish)
Michigan    
Race Name Race Website Published Time Limit and Special Info
Martian Half Marathon http://www.martianmarathon.com/ 5 hours
Charlevoix Half Marathon http://charlevoixmarathon.com/ Official early start for walkers (no runners)   Finish line is open for until 1 pm (7 am runner start)
Detroit Free Press Half Marathon http://www.freepmarathon.com/ "You must be able to complete the International Half in four hours, and the U.S. Half-Marathon in three and a half hours"
Groundhog Day Half Marathon http://www.groundhogmarathon.com/ Not published, but billed as walker friendly. The half marathoners should have as much time as the full marathoners to finish.
Minnesota    
Race Name Race Website Published Time Limit and Special Info
We Walk! Half Marathon http://www.wewalkmarathon.com 7.5 hour time limit.   Race is designed for walkers, run/walkers, etc.
Med City Half Marathon http://medcitymarathon.com/ Half and full have 6.5 hour time limit
Mississippi    
Race Name Race Website Published Time Limit and Special Info
Mississippi Blues Half Marathon http://www.msbluesmarathon.com/ Half and full have 7 hour time limit
Bring It to the Bay Half Marathon http://FitFirstBSL.com/Half 4 hour time limit for timing. All participants allowed to cross the line.
Tupelo Half Marathon http://tupelomarathon.racesonline.com/home Clock stops timing at 6 hours
Missouri    
Race Name Race Website Published Time Limit and Special Info
Hospital Hill Half Marathon http://www.hospitalhillrun.com/ 3:30 time limit
Kansas City Half Marathon http://waddellandreedkansascitymarathon.org/ 6 hours (same as marathon)
Frog Hill Half Marathon http://www.froghillhalf.com 4 hour time limit. But director stays until the last person crosses.
St. Louis Half Marathon http://www.stlouistrackclub.com/half-marathon/race-day-info/ 3:30 hours, but walkers can officially start 30 minutes early to get 4 hours. 
Montana    
Race Name Race Website Published Time Limit and Special Info
Missoula Half Marathon http://www.missoulamarathon.org/ The half and full marathon have a 7.5 hour limit.
Nebraska    
Race Name Race Website Published Time Limit and Special Info
Omaha Half Marathon http://omahamarathon.com/ 3.5 hour time limit
Nevada    
Race Name Race Website Published Time Limit and Special Info
Rock Tahoe Half Marathon http://www.epictahoe.com/ Offers an early start (1 hour early) for walkers and runners projecting 3-4 hour times. 
New Hampshire    
Race Name Race Website Published Time Limit and Special Info
Half at the Hamptons http://www.locorunning.com/hamptonhalf/index.html 3:30 time limit
Seacoast Half Marathon http://www.seacoasthalfmarathon.com/ Walkers have a separate early start and have a 3:30 total time limit. If you register as a walker, you must walk only, or you may be disqualified.
Great Bay Half Marathon http://www.greatbayhalf.com/ 3:30 time limit
Big Lake Half Marathon http://biglakehalfmarathon.com/ 4:00 time limit
New Hampshire Half Marathon http://www.nhmarathon.com/ 6:30 (there is also a full marathon. Half marathoners are bussed to the 13.1 mark to start)
Rockfest Half Marathon http://www.hamptonrockfest.com/ 3:30 time limit
White Mountain Milers Half Marathon http://www.wmmhalf.com/ 3:30 time limit
Manchester City Half Marathon http://www.cityofmanchestermarathon.com/halfmarathon.php Offers Early Start
Jingle Bell Half Marathon http://jinglebellhalf.com/ 3:30 time limit
New Jersey    
Race Name Race Website Published Time Limit and Special Info
April Fools Half Marathon http://www.acraceseries.com/April_Fools.htm 4 hour time limit
Wild Half Marathon www.runwildwoods.com 4 hour time limit
New Mexico    
Race Name Race Website Published Time Limit and Special Info
No races provided yet.

New York    
Race Name Race Website Published Time Limit and Special Info
Wineglass Half Marathon http://www.wineglassmarathon.com/ 7.25 hours
Hambletonian Half Marathon http://www.hambletonianmarathon.com/ Six hour time limit (full marathon goes off with the half, same limit)
Celebrate Life Half Marathon http://celebratelifehalfmarathon.com/ Offers a walker early start at 8:30 and a slower runner early start at 9:30 for those taking over 2:30 hours.   
Lake Placid Half Marathon http://www.lakeplacidmarathon.com/ 6:00 (full marathon also offered)
North Carolina    
Race Name Race Website Published Time Limit and Special Info
Flying Pirate Half Marathon http://www.flyingpiratehalfmarathon.com/ 4 hours
Kings Mountain Half Marathon http://www.kingsmountainmarathon.com 6 hours (full marathon's time limit)
Southern Fried Half Marathon (Outer Banks) http://www.outerbanksmarathon.com/ 4.5 hours
Battleship Half Marathon http://www.5starraceproductions.com/races/port-city-orthopaedics-battle-half-marathon-5k/signup Walkers have an hour early start and must finish the course in 4 hours
North Dakota    
Race Name Race Website Published Time Limit and Special Info
Fargo Half Marathon http://www.fargomarathon.com/index.html Walkers welcome; full marathon has 7 hour time limit
Ohio    
Race Name Race Website Published Time Limit and Special Info
Adams County Marathon www.adamscountytravel.org No time limit- will stay till last runner finishes
"To Do My Best" Half Marathon https://runsignup.com/Race/OH/Piqua/ToDoMyBest5k10kHalfMarathon 4 Hours 
Capital City Half Marathon http://www.capitalcityhalfmarathon.com/ 4 hour time limit 
Towpath Half Marathon http://www.towpathtrilogy.net/Marathon/ Official early start for walkers.   (1 hour early start).   Course open 6 hours for half and full
Pro Football Hall of Fame Half Marathon http://www.hofmarathon.com/ 4 hour time limit
Union Hospital Run for Home Half Marathon http://www.runforhome.org/ 3:30 time limit
Flying Pig Half Marathon www.flyingpigmarathon.com 4 hours for the half marathon
Glass City Half Marathon (Corning) http://glasscitymarathon.org/ 4 hours
Queen Bee Half Marathon www.queenbeehalf.com 4 hour time limit
Air Force Half Marathon http://www.usafmarathon.com/Registration/faq.htm 6:00 for the half marathon
Loveland Half Marathon http://www.cincyhalfmarathon.com/LHM.htm 4 hour time limit
Winan's to Winan's Half Marathon http://www.winanscandies.com/halfmarathon/ No published time limit, but they run shuttles back to start until 4:30 hours after the start time and I know last year the last finisher came in after 4 hours with full support along the course.   Email them.
Oklahoma    
Race Name Race Website Published Time Limit and Special Info
Route 66 Half Marathon http://route66marathon.com/ Half marathon remains closed to traffic for 3:30 hours.   You can continue and finish after that (timing is up to 7.5 hours for full)
Oklahoma City Memorial Half Marathon http://okcmarathon.com/ 6.5 hours
Oregon    
Race Name Race Website Published Time Limit and Special Info
Foot Traffic Half Marathon http://www.foottraffic.us/flat/ Full marathon has   6 hours
Eugene Half Marathon http://eugenemarathon.com/half-marathon/ 3:30 time limit
Portland Half Marathon http://portlandmarathon.org/   8 hours (same as full marathon)
Pennsylvania    
Race Name Race Website Published Time Limit and Special Info
Bird in Hand Half Marathon www.bihhalf.com 4 hours
D&L Half Marathon http://race.delawareandlehigh.org/walkers/ 4:30 time limit 
PA Grand Canyon Half Marathon http://www.pagrandcanyonmarathon.com Has 4 hour + finishers on each half marathon day
Harrisburg Half Marathon http://ymcarun.com/info-half/ 4 hour time limit, plus additional early start for walkers.   
1/2 Sauer 1/2 Kraut Half Marathon http://www.uberendurancesports.com/races.html?hc_location=ufi Partial trail race.   6 hour time limit (same for marathoners).   Advised as hot, hilly, and humid.   
Garden Spot Village Half Marathon gardenspotvillagemarathon.org No finish time- "finish line will remain open until all those who wish to finish cross it"
Rhode Island    
Race Name Race Website Published Time Limit and Special Info
Rhode Races Providence Half Marathon http://runri.us 3:30 time limit
Blackstone Valley Half Marathon http://www.bvhalf.com/ 3:30 time limit
Narragansett Bay Half Marathon http://www.nbhalf.com/ 3:30 time limit
Rhode Races Narragansett Half Marathon http://runri.us 3:30 time limit
Rhode Races Bristol Half Marathon http://runri.us 3:30 time limit
Rhode Races Newport Half Marathon http://runri.us 3:30 time limit
Rhode Races Jamestown Half Marathon http://runri.us 3:30 time limit
South Carolina    
Race Name Race Website Published Time Limit and Special Info
Kiawah Island Half Marathon http://www.kiawahresort.com/recreation/kiawah-island-marathon/about-the-course Course open for 6.5 hours (marathon going on at same time)
Run Hard Lexington Half Marathon https://www.lexingtonhalf.com/index.php 4 hours
South Dakota    
Race Name Race Website Published Time Limit and Special Info
Sioux Falls Half Marathon http://www.siouxfallsmarathonhalfmarathon.com/ 5.5 hours
Swan Lake Half Marathon http://www.myslcc.com/marathon/marathon-information/ 3.5 hours
Tennessee    
Race Name Race Website Published Time Limit and Special Info
St. Jude Memphis Half Marathon http://www.stjudemarathon.org/ 4:20 time limit for the half
Nashville Half Marathon http://whatdoyourunfor.com/nashville-half-marathon/ 4 hours
Raccoon Mountain Half Marathon http://runchattanooga.org/rmm/ Partial trail race. Half marathoners allowed as much time as the full marathoners. 8 hours
Texas    
Race Name Race Website Published Time Limit and Special Info
Showdown Half Marathon http://www.showdownhalf.com/Course_Details.html 4:00 time limit
USAFIT Half Marathon http://www.usafitmarathon.com/ "Athletes can take up to eight hours to finish this course, so no one is left behind"
New Years Double http://www.newyearsdouble.com/General_Info.html 7:00 (full marathon also being held)
Austin 3M Half Marathon http://www.3mhalfmarathon.com/ 4:00 time limit
Masquerade Half Marathon http://alamo131.com/masquerade-half/ 4:00 time limit
Cowtown Half Marathon http://cowtownmarathon.org Half Mararthon 4:30 hours, fully supported.
Cocoa Womans Half Marathon http://www.cocoahalf.com/ 4:00 time limit
BCS Half Marathon http://www.bcsmarathon.com/ 6:30 time limit
Houston Half Marathon http://www.houstonhalf.com/index.html 4 hours time limit
Metal Saw Texas Half Marathon http://www.50statesmarathonclub.com/texas.html This event is walker and velocity challenged participant friendly.   The only time limit is that participants must finish before dark (5:30pm)
Fairview Half Marathon http://fairviewhalf.com/Course_Details.html 4:00 time limit
Utah    
No races provided yet.

Vermont    
Race Name Race Website Published Time Limit and Special Info
Mad Half Marathon http://www.madmarathon.com/ 6:00 (full marathon shares same finish line and parts of same course)
Maple Leaf Half Marathon http://www.manchestervtmapleleaf.com/mapleleaf/ 4:00 time limit
Virginia    
Race Name Race Website Published Time Limit and Special Info
Crawlin Crab Half Marathon http://www.crawlincrabhalf.com/ 4 hours
American Family Fitness Half Marathon (Richmond Marathon) http://www.richmondmarathon.com/ 4 hours
Anthem Shamrock Half Marathon http://www.shamrockmarathon.com/race-info/anthem-half-marathon/ 4 hours for half marathon
Run For the Dream Half Marathon http://www.runforachievabledream.com/ 4 hours
Dismal Swamp Stomp Half Marathon http://dismalswampstomp.mettleevents.com/index.html 4 hours.   Has a half marathon walk category. Course is both paved path and forested wetlands.
Battlefield Half Marathon http://www.fcva.us/departments/o-z/parks-recreation/community-events/battlefield-half 3:30 time limit
Blue Ridge Half Marathon http://blueridgemarathon.com/ 8 hours-same time as allowed for full marathon.
Washington (State)    
Race Name Race Website Published Time Limit and Special Info
Cupcake Fun Run http://www.cupcakeruns.com 12 hour time limit- per RD, "we cater to everyone!"
Amica Seattle Half Marathon http://www.seattlemarathon.org/#marathon Walkers have a separate category and start.   Allows for a 24 min/mile pace for walkers
Sage Rat Run http://sageratrun.com/ "If you cannot keep the required pace on course and finish in 4 hours and 30 minutes, you will not be guaranteed course supervision by law enforcement and volunteers." Finish line kept open
Washington DC    
Race Name Race Website Published Time Limit and Special Info
Navy Air Force Half Marathon www.navyairforcehalfmarathon.com 4 hours
Abebe Bikila Half Marathon http://www.safetyandhealthfoundation.org/bikila/ Optional 1-2 hour early start, partner with full marathon also, so 6-7 hour time limit.   Small and friendly.
Potomac River Run 
http://www.safetyandhealthfoundation.org/marathon/ Optional 1 hour early start, partnered with a full marathon, so 6-7 hour time limit.   Race offered both early May and mid-November.
West Virginia    
Race Name Race Website Published Time Limit and Special Info
Freedom's Run Half Marathon http://www.freedomsrun.org/Default.aspx 5 hours
Hatfield & McCoy Half Marathon http://www.hatfieldmccoymarathon.net/ No time limit* Note- they have two half marathons (full course split). One starts in KY the other in WV.
Veterun Half Marathon http://www.veterun.org/race-info No time limit- see website for more info
Wisconsin    
Race Name Race Website Published Time Limit and Special Info
Her Madison Half Marathon http://hermadisonhalf.com/ Women's themed event.   Has a 7 am start for those taking over 4 hours, and an 8 am start for those 4 hours and under. Total time limit-   5 hours from early start.
Whistlestop Half Marathon http://www.whistlestopmarathon.com/ 6 hour time limit
Driftless 50 Events Half Marathon http://www.cheyennecreekcamp.net/ 4 hour time limit- this is a trail race.
Madison Half Marathon http://www.madisonmarathon.org/spring/races/halfmarathonrun.html 4.5 hours (a 20 minute/mile pace)
Wyoming    
No races provided yet.

CANADA    
Niagara Falls Women's Half Marathon http://www.nfwhm.com/ 4 hour time limit. Note- men may participate; just know the shirts are all women's sizes
Queen City Half Marathon http://runqcm.com/index 4 hour time limit. 
Perth Kilt Run - Slow Half http://www.perthkiltrun2016.ca/ 5 Hour time limit for the Sunday Half Marathon. Special note: This race event has a Half Marathon on Saturday evening with a 2:30 hour time limit. But an additional new "Slow Half" is just being added for Sunday - June 26, 2016. For the Sunday Slow Half, you must not have run a Half Marathon faster than 2:30hrs previously (5 hrs to finish).   This will be a race for "back of the packers", to move to the front of the finish line!