August 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 August 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.


Sunday, August 1

Monday, August 2 – Friday, August 6

Saturday, August 7

Sunday, August 8

Sun Aug 8 Beaverton Half Marathon 10K & 5K Beaverton OR
Sun Aug 8 Emerald Mountain Epic Marathon & Half Marathon Steamboat Springs CO
Sun Aug 8 Funky Monkey Half Marathon & 5K North Kingstown RI
Sun Aug 8 Little Miami Half Marathon & 10K Morrow OH
Sun Aug 8 Run for the Elk Half Marathon Benezette PA
Sun Aug 8 Treasured Haven Farm Veggie Run Half Marathon Rush City MN

Saturday, August 14

Sunday, August 15

Sun Aug 15 America's Finest City Half Marathon & 5K San Diego CA
Sun Aug 15 Bridge of the Gods Half Marathon 10K & 5K Cascade Locks OR
Sun Aug 15 Geneva Half Marathon Geneva NY
Sun Aug 15 Trust Trail Fest Half Marathon 10K & 5K Kennebunkport ME

Saturday, August 21

Sunday, August 22

Saturday, August 28

Sunday, August 29

Sun Aug 29 Black Diamond Express Half Marathon & 5K Mendon NY
Sun Aug 29 Blueberry Cove 13.1 Half Marathon Tenants Harbor ME
Sun Aug 29 Mendocino Running Festival Half Marathon & 10K Mendocino CA
Sun Aug 29 Sioux Falls Marathon Half Marathon & 5K Sioux Falls SD
Sun Aug 29 Wee-Chi-Tah Half Marathon & 10K Wichita Falls TX