September 2021 Half Marathons

NOTE: Many races have been cancelled, postponed, or switched to virtual-only due to the ongoing COVID-19 pandemic. We’re doing our best to update information as soon as possible, but check the race’s website for the latest details.

See all September 2021 half marathons across the USA below, or click Race Calendars above to see each state’s calendar. For each race, you’ll find course maps, elevation profiles, reviews and info on how to register.


Saturday, September 4

Sunday, September 5

Monday, September 6 – Friday, September 10

Saturday, September 11

Sat Sep 11 Amish Country Half Marathon 10K & 5K Berlin OH
Sat Sep 11 Apple Dumpling Days Marathon Half Marathon & 5K Elroy WI
Sat Sep 11 Area 13.1 Half Marathon & Terrestrial 5K Roswell GA
Sat Sep 11 Bird-in-Hand Half Marathon & 5K Bird-in-Hand PA
Sat Sep 11 Black Squirrel Half Marathon Fort Collins CO
Sat Sep 11 Blackwater Canyon Half Marathon Parson WV
Sat Sep 11 Cedar City Half Marathon Cedar City UT
Sat Sep 11 Charlotte Covered Bridge Half Marathon 10K & 5K Shelburne VT
Sat Sep 11 Chi Town Half Marathon & 10K Chicago IL
Sat Sep 11 Fair on the Square Marathon Half Marathon & 5K Danville IN
Sat Sep 11 Great Olympic Adventure Trail Run Marathon Half Marathon & 50K Port Angeles WA
Sat Sep 11 Great Smoky Mountains Half Marathon Maryville TN
Sat Sep 11 Hidden Gem Half Marathon Flossmoor IL
Sat Sep 11 Honor the Fallen Half Marathon 10K & 5K Grand Prairie TX
Sat Sep 11 Ice Age Trail Run Half Marathon 50-Mile & 50K La Grange WI
Sat Sep 11 International Peace Marathon & Half Marathon Washington DC
Sat Sep 11 Maple Leaf Half Marathon & 5K Manchester Center VT
Sat Sep 11 Mellow Trail Run Marathon Half Marathon 10K & 5K Spicewood TX
Sat Sep 11 Ned*Ned Half Marathon 10K & 5K Nederland CO
Sat Sep 11 Old Forge Marathon Half Marathon 10K & 5K Old Forge NY
Sat Sep 11 Pacifica Summit Run Half Marathon Pacifica CA
Sat Sep 11 Park City Trail Series Half Marathon Park City UT
Sat Sep 11 Patriots Run Marathon Half Marathon 5K & Ultra Olathe KS
Sat Sep 11 Revel Big Cottonwood Marathon & Half Marathon Salt Lake City UT
Sat Sep 11 Run Lake Max Half Marathon 10K & 5K Culver IN
Sat Sep 11 Running of the Bays Half Marathon Mound MN
Sat Sep 11 San Juan Island Half Marathon Friday Harbor WA
Sat Sep 11 Surf City USA Marathon & Half Marathon Huntington Beach CA

Sunday, September 12

Sun Sep 12 Alternative Half Marathon Washington Crossing PA
Sun Sep 12 Black Goose Running Festival Half Marathon 10K & 5K East Providence RI
Sun Sep 12 Boring Marathon Half-Boring Half Marathon & Constantly Boring 8K Boring OR
Sun Sep 12 Bozeman Marathon & Half Marathon Bozeman MT
Sun Sep 12 Chips and Salsa Half Marathon 10K & 5K Albuquerque NM
Sun Sep 12 City to the Sea Half Marathon & Seaside 5K San Luis Obispo CA
Sun Sep 12 Clinton Half Marathon Clinton IA
Sun Sep 12 Down2Earth Cross Country Half Marathon 10K & 5K Hialeah FL
Sun Sep 12 Half Note Half Marathon & 5K Stevensville MI
Sun Sep 12 Harrisburg Half Marathon Harrisburg PA
Sun Sep 12 Holland Haven Marathon & Half Marathon Holland MI
Sun Sep 12 Lake Auburn Half Marathon & 5K Auburn ME
Sun Sep 12 Lake Placid Marathon & Half Marathon Lake Placid NY
Sun Sep 12 Luray Half Marathon & 5K Luray VA
Sun Sep 12 Mad Marathon & Half Marathon Waitsfield VT
Sun Sep 12 Med City Marathon Half Marathon 20-Mile & Relay Rochester MN
Sun Sep 12 Racefaster Half Marathon & 5K Paramus NJ
Sun Sep 12 Skagit Falls Marathon & Half Marathon Burlington WA
Sun Sep 12 Surftown Half Marathon & 5K Westerly RI
Sun Sep 12 T-Bird Trek Half Marathon 10K & 5K Casper WY
Sun Sep 12 Whidbey Island Marathon Half Marathon 10K & 5K Oak Harbor WA
Sun Sep 12 Winans to Winans Half Marathon Troy OH
Sun Sep 12 Witch's Hat Run Half Marathon & 5K South Lyon MI
Sun Sep 12 Women Run the D Half Marathon 10K & 5K Detroit MI

Monday, September 13 – Friday, September 17

Saturday, September 18

Sat Sep 18 Air Force Marathon Half Marathon & 10K Wright-Patterson AFB OH
Sat Sep 18 All-Out Fall Fest Marathon Half Marathon 10K & 5K Westminster CO
Sat Sep 18 Autumn Color Run Half Marathon 10K & 5K Buena Vista CO
Sat Sep 18 Bar Harbor Bank & Trust Half Marathon & Fall 5K Bar Harbor ME
Sat Sep 18 Best in the West Triathlon Festival Half Marathon & 10K Sweethome OR
Sat Sep 18 Bismarck Marathon Half Marathon 10K & Relay Bismarck ND
Sat Sep 18 Buffalo Bill Cody Races Half Marathon & 10K Cody WY
Sat Sep 18 Cascade Express Half Marathon Snoqualmie Pass WA
Sat Sep 18 Center of the Nation Marathon Half Marathon 10K & 5K – Day 6 Baker MT
Sat Sep 18 Cherokee Harvest Half Marathon Cherokee NC
Sat Sep 18 Decorah Loop de Loop Half Marathon 10K & 5K Decorah IA
Sat Sep 18 Devil After Dark Marathon Half Marathon 10K & 5K Las Vegas NV
Sat Sep 18 Do the Q Half Marathon Quarter Marathon & 5K Tulsa OK
Sat Sep 18 The Equinox Half Marathon 10K & 5K Wentworth NC
Sat Sep 18 Famous Idaho Potato Marathon Half Marathon 10K & 5K Boise ID
Sat Sep 18 Firebird Trail Races 13-Mile & 50K Windham ME
Sat Sep 18 Golden Leaf Half Marathon Aspen CO
Sat Sep 18 Greater Midland Dow RunWalk Half Marathon Midland MI
Sat Sep 18 Happy Girls Run Spokane Half Marathon 10K & 5K Spokane WA
Sat Sep 18 Hendersonville Half Marathon Hendersonville TN
Sat Sep 18 Hoptown Half Marathon & 5K Hopkinsville KY
Sat Sep 18 Huntsville Marathon Half Marathon 10K & 5K Huntsville UT
Sat Sep 18 Jamestown Half Marathon Jamestown RI
Sat Sep 18 Ka'u Coffee Trail Runs Half Marathon 50K 10K & 5K Pahala HI
Sat Sep 18 Mini Donut Half Marathon Trempealeau WI
Sat Sep 18 Mount Rushmore Half Marathon Keystone SD
Sat Sep 18 Mountain Rats Marathon Half Marathon & 55K Eagle CO
Sat Sep 18 Northeast Kingdom Marathon & Half Marathon Island Pond VT
Sat Sep 18 Odyssey Trail Running Rampage Half Marathon Douthat SP VA
Sat Sep 18 Orca Half Marathon Seattle WA
Sat Sep 18 Pacific Northwest Marathon Half Marathon & 5K Eugene OR
Sat Sep 18 Pinedale Half Marathon 10K & 1-Mile Pinedale WY
Sat Sep 18 Pub 2 Pub Half Marathon & 5K St. James MO
Sat Sep 18 Rock 'n' the Knob Trail Challenge Marathon Half Marathon & 10K Claysburg PA
Sat Sep 18 Rockin' Rockwoods Half Marathon & 53K Wildwood MO
Sat Sep 18 Run the Dam Half Marathon 10K & 5K Grand Coulee WA
Sat Sep 18 Run the River for the Ridge Half Marathon Riverside CA
Sat Sep 18 San Jose Spartan Trail Half Marathon 50K & 10K Saratoga CA
Sat Sep 18 Sterling Furnace Half Marathon Tuxedo NY
Sat Sep 18 Take It to the Lake Half Marathon & 10K Ely NV
Sat Sep 18 Tour des Fleurs Half Marathon & Quarter Marathon Dallas TX
Sat Sep 18 Uintah Half Marathon Vernal UT
Sat Sep 18 Wells Harbor Half Marathon & 5K Wells ME
Sat Sep 18 Wolf Creek Wrangle Trail Run Half Marathon 10K & 5K Wolf WY

Sunday, September 19

Sun Sep 19 Annapolis Run for the Lighthouse Half Marathon & 5K Annapolis MD
Sun Sep 19 AppleTree Marathon & Half Marathon Vancouver WA
Sun Sep 19 Avenue of the Giants Marathon Half Marathon & 10K Weott CA
Sun Sep 19 Boston Harvest Half Marathon 10K & 5K Boston PA
Sun Sep 19 Capital City River Run Half Marathon & 5K Lansing MI
Sun Sep 19 Caribou Marathon Half Marathon & Relays Caribou ME
Sun Sep 19 Cheyenne Marathon & Half Marathon Cheyenne WY
Sun Sep 19 City of Roses Half Marathon & 5K Cape Girardeau MO
Sun Sep 19 Clo Cow Half Marathon Petaluma CA
Sun Sep 19 DC Half & Relay Washington DC
Sun Sep 19 Discover Whitewater Series Half Marathon & 5K Whitewater WI
Sun Sep 19 Equinox Marathon Half Marathon & 5-Mile Fort Collins CO
Sun Sep 19 Fox Cities Marathon Half Marathon & Relay Appleton WI
Sun Sep 19 Fox Valley Marathon Half Marathon 20-Mile & 5K St. Charles IL
Sun Sep 19 Gnarled Orchard Hard Cider Challenge Half Marathon 10K & 5K Delaplane VA
Sun Sep 19 Greater Des Moines Women's Half Marathon & 5K Des Moines IA
Sun Sep 19 Green Cathedral Half Marathon & 5K Youngstown OH
Sun Sep 19 Half Marathon-by-the-Sea Half Marathon Manchester-by-the-Sea MA
Sun Sep 19 Harvest Half Marathon 10K & 5K Van Nuys CA
Sun Sep 19 Hub City Half Marathon Crown Point IN
Sun Sep 19 Iowa Trail Run Series – Yellow River State Park Half Marathon 10K & 5K Harpers Ferry IA
Sun Sep 19 Iron Horse Half Marathon Midway KY
Sun Sep 19 Kismet Cliff Run Half Marathon & 5-Mile Conway NH
Sun Sep 19 Long Island Marathon & Half Marathon East Meadow NY
Sun Sep 19 Montana Marathon Half Marathon & 10K Billings MT
Sun Sep 19 Newport Liberty Half Marathon Jersey City NJ
Sun Sep 19 Omaha Marathon Half Marathon 10K & 5K Omaha NE
Sun Sep 19 Orca Half Marathon Seattle WA
Sun Sep 19 Planet NY Half Marathon New York NY
Sun Sep 19 Prospect Park Half Marathon New York NY
Sun Sep 19 Race for a Soldier Half Marathon 10-Mile & 5K Gig Harbor WA
Sun Sep 19 Scenic Half Marathon & 10K Sandpoint ID
Sun Sep 19 Snow Mountain Ranch Trail Running Festival Granby CO
Sun Sep 19 Trapp Cabin Trail Half Marathon 10K & 5K Stowe VT
Sun Sep 19 Triboro Adventure Tour Half Marathon New York NY
Sun Sep 19 Wicked Half Marathon Salem MA

Monday, September 20 – Friday, September 24

Fri Sep 24 Zion at Night Half Marathon Apple Valley UT

Saturday, September 25

Sat Sep 25 45th Infantry Brigade Combat Team Fallen Heroes Half Marathon Oklahoma City OK
Sat Sep 25 Akron Marathon Half Marathon & Relay Akron OH
Sat Sep 25 Amish Country Running Festival Randolph NY
Sat Sep 25 Armed Services Marathon Half Marathon & 5K Spring Lake MI
Sat Sep 25 Best Damn Race Orlando Half Marathon 10K & 5K Orlando FL
Sat Sep 25 Betsy Farris Memorial Run Columbia MO
Sat Sep 25 Birkie Trail Run Festival Cable WI
Sat Sep 25 Bridges and Bluffs Half Marathon Ironwood MI
Sat Sep 25 Carrollton Half Marathon Carrollton GA
Sat Sep 25 Ely Marathon Half Marathon 5K & Relay Ely MN
Sat Sep 25 Empowered Half Marathon & 5K River Falls WI
Sat Sep 25 Fargo Marathon Half Marathon 10K & Relay Fargo ND
Sat Sep 25 Grand Lake Marathon Half Marathon 5K & Relay Celina OH
Sat Sep 25 Great South Bay Half Marathon 10K & 5K Bay Shore NY
Sat Sep 25 Hogsback Half Marathon Colebrook CT
Sat Sep 25 Hungerford Games Trail Race Half Marathon Big Rapids MI
Sat Sep 25 Hurricane Honor Trail Race Half Marathon 10K & 5K Hurricane WV
Sat Sep 25 Indy Women's Half Marathon & 5K Indianapolis IN
Sat Sep 25 Jackson Hole Marathon Half Marathon & Quarter Marathon Jackson Hole WY
Sat Sep 25 Jailbreak Marathon Half Marathon & 5K Wautoma WI
Sat Sep 25 Jordan River Half Marathon South Jordan UT
Sat Sep 25 Magnolia Meltdown Half Marathon 10K & 5K Ridgeland MS
Sat Sep 25 Mahoosuc Ridge to the River Challenge Marathon Half Marathon & 10K Newry ME
Sat Sep 25 Mill Race Marathon Half Marathon & 5K Columbus IN
Sat Sep 25 Monument Marathon Half Marathon & 5K Scottsbluff NE
Sat Sep 25 Moraine Hills Run for the Hills Half Marathon McHenry IL
Sat Sep 25 New Yorker Half Marathon New York NY
Sat Sep 25 Paris Pair Marathon Half Marathon 10K & 5K Paris TX
Sat Sep 25 Park2Park Half Marathon & 5K Holland MI
Sat Sep 25 Pioneer Prairie Dog Half Marathon 10K & 5K Westminster CO
Sat Sep 25 Priest Lake Marathon Half Marathon Quarter Marathon 50K 25K & 5K Priest Lake ID
Sat Sep 25 Run for the Trails Half Marathon 10K & 5K Oconto Falls WI
Sat Sep 25 Run Iron Mountain Road and Trail Half Marathon Iron Mountain MI
Sat Sep 25 Run the Red Desert Half Marathon 50K & 100K South Pass City WY
Sat Sep 25 Sandia Crest Marathon & Half Marathon Albuquerque NM
Sat Sep 25 Stone Bridge Half Marathon & 5K Roscoe IL
Sat Sep 25 Summerlin Half Marathon Summerlin NV
Sat Sep 25 Sunburst Races Half Marathon 10K & 5K South Bend IN
Sat Sep 25 Surly Trail Loppet Half Marathon 7-Mile & 5K Minneapolis MN
Sat Sep 25 Susquehanna River Running Festival Half Marathon 10K & 5K Havre de Grace MD
Sat Sep 25 Three Sisters Skyline Half Marathon Sisters OR
Sat Sep 25 Waldoboro Half Marathon Waldoboro ME
Sat Sep 25 Wander the Water Half Marathon Albert Lea MN
Sat Sep 25 White Mountain Milers Half Marathon 10K & 5K North Conway NH
Sat Sep 25 Willie McCool Memorial Half Marathon 10K & 5K Lubbock TX
Sat Sep 25 Witch Run Half Marathon 10K & 5K West Jordan UT
Sat Sep 25 World's End Fall Classic Half Marathon Forksville PA

Sunday, September 26