See all August 2023 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, August 5
| Sat Aug 5 | 3H Trail Half Marathon | King George VA |
| Sat Aug 5 | All-Out Runapalooza Half Marathon 10k 5k & 1M | Arvada CO |
| Sat Aug 5 | Angel Island Half Marathon & 10k | Tiburon CA |
| Sat Aug 5 | Beaver Canyon Marathon & Half Marathon | Beaver UT |
| Sat Aug 5 | E.T. Full Moon Midnight 51k Marathon Half Marathon 10k & 5k | Rachel NV |
| Sat Aug 5 | High Mountain Half Marathon 10k & 5k | Pinetop-Lakeside AZ |
| Sat Aug 5 | John & Jessie Kelley Half Marathon | New London CT |
| Sat Aug 5 | NYC Summer Half Central Park | New York NY |
| Sat Aug 5 | Park City Trail Series Half Marathon | Park City UT |
| Sat Aug 5 | Still Hollow Trail Race Half Marathon & 10k | Chattanooga TN |
| Sat Aug 5 | The Legend Half Marathon 10M & 5M | Laingsburg MI |
| Sat Aug 5 | Tiger Peak Challenge 50k Half Marathon & 5k | Issaquah WA |
Sunday, August 6
| Sun Aug 6 | Bridge of the Gods Run Half Marathon 10k & 5M | Cascade Locks OR |
| Sun Aug 6 | Camarillo Marathon Half Marathon 10K & 5K | Camarillo CA |
| Sun Aug 6 | Funky Monkey Half Marathon 10k & 5k | Seekonk MA |
| Sun Aug 6 | Little Miami Half Marathon | Morrow OH |
| Sun Aug 6 | Skyline 50K & Half Marathon | Castro Valley CA |
| Sun Aug 6 | TripleThreat Half Marathon 5k & 1M | Rockport MA |
Saturday, August 12
| Sat Aug 12 | Dave McKay Memorial Half Marathon & 5k | Flagstaff AZ |
| Sat Aug 12 | Dragon's Den Half Marathon | San Antonio TX |
| Sat Aug 12 | Goodyear Half Marathon & 10K | Akron OH |
| Sat Aug 12 | Gopher to Badger Half Marathon 10K & 5K | Stillwater MN |
| Sat Aug 12 | Haulin' Aspen Marathon Half Marathon & 6.5M | Bend OR |
| Sat Aug 12 | Med Bow Rail Marathon & Half Marathon | Albany WY |
| Sat Aug 12 | Mines of Spain Trail Races Half Marathon 7M & 4M | Dubuque IA |
| Sat Aug 12 | Paavo Nurmi Marathon Half Marathon and Relay | Hurley WI |
| Sat Aug 12 | Redwood Trail Run (Summer) 50k Marathon 30k Half Marathon & 5M | Oakland CA |
| Sat Aug 12 | Suncadia Half & 5k | Cle Elum WA |
| Sat Aug 12 | Tacoma Narrows Half Marathon & 5k | Tacoma WA |
Sunday, August 13
| Sun Aug 13 | Geneva Half Marathon | Geneva NY |
| Sun Aug 13 | SAR Wild Run Half Marathon 10k & 5k | Shaver Lake CA |
Saturday, August 19
| Sat Aug 19 | Hot Trot Half Marathon 10k & 5k | Dallas TX |
| Sat Aug 19 | Mt Sneffels Marathon Half Marathon & 10K | Ouray CO |
| Sat Aug 19 | Nitty Gritty Off Road Race Marathon Half Marathon & Relay | Red Lodge MT |
| Sat Aug 19 | PC2PG Half Marathon 10k & 5k | Lindon UT |
| Sat Aug 19 | Post Canyon 50k & Half Marathon | Hood River OR |
| Sat Aug 19 | Running Between the Vines Half Marathon 5M & 5k | Jackson MI |
| Sat Aug 19 | Trail Run at Sly Park | Pollock Pines CA |
| Sat Aug 19 | Wausau Marathon Half Marathon & Relay | Wausau WI |
| Sat Aug 19 | Wells Harbor Half Marathon & 5k | Wells ME |
| Sat Aug 19 | Wild Turkey 50k 25k Half Marathon & 8 Miler | Fairmont WV |
Sunday, August 20
| Sun Aug 20 | America's Finest City Half Marathon & 5K | San Diego CA |
| Sun Aug 20 | Anchorage RunFest 49k Marathon Half Marathon & 5k | Anchorage AK |
| Sun Aug 20 | Erie Half Marathon | Erie CO |
| Sun Aug 20 | Fall Creek Falls Half Marathon 10k & 5k | Spencer TN |
| Sun Aug 20 | Iron Horse Half Marathon | North Bend WA |
Monday, August 21-Friday, August 25
| Fri Aug 25 | Cedar Breaks at Night Half Marathon | Brian Head UT |
Saturday, August 26
Sunday, August 27
| Sun Aug 27 | Blueberry Cove 13.1 | Tenants Harbor ME |
| Sun Aug 27 | Boston Bound Marathon Marathon & Half Marathon | Menomonee Falls WI |
| Sun Aug 27 | Carrabassett Valley Half Marathon | Carrabassett Valley ME |
| Sun Aug 27 | North Country Trail Run Marathon & Half Marathon | Manistee MI |
| Sun Aug 27 | Santa Rosa Marathon & Half Marathon | Santa Rosa CA |
| Sun Aug 27 | Sioux Falls Marathon Half Marathon 10k & 5k | Sioux Falls SD |
| Sun Aug 27 | Tour de La Porte Half Marathon & 5k | La Porte IN |
| Sun Aug 27 | Wee-Chi-Tah Trail Events Half Marathon & 10k | Wichita Falls TX |
