See all January 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.
Friday, January 1
| Fri Jan 1 | Bling in the New Year Marathon & Half Marathon | Snohomish WA |
| Fri Jan 1 | Brazen New Year's Day Half Marathon 10K & 5K | Castro Valley CA |
| Fri Jan 1 | Chilly Willy Half Marathon 10K & 5K | East Providence RI |
| Fri Jan 1 | Clikapudi Trail Runs Half Marathon 10K & 5K | Redding CA |
| Fri Jan 1 | New Years Double Marathon Half Marathon & 5K | Allen TX |
| Fri Jan 1 | Sawblade Texas Marathon & Half Marathon | Kingwood TX |
Saturday, January 2
| Sat Jan 2 | Buckeye Marathon Half Marathon 10K 5K & 1-Mile | Buckeye AZ |
| Sat Jan 2 | Moonlight Beach Run Half Marathon 15K 10K & 5K | Daytona Beach FL |
| Sat Jan 2 | Oregon Road Runners Club Y2K Half Marathon & 10K | Forest Grove OR |
| Sat Jan 2 | Run in the New Year Half Marathon 10K & 5K | Huntington Beach CA |
| Sat Jan 2 | Twin Cities Polar Dash Half Marathon | St. Paul MN |
Sunday, January 3
| Sun Jan 3 | Canton Half Marathon 10K & 5K | Canton TX |
| Sun Jan 3 | Dia De Reyes Half Marathon & 5K | Fresno CA |
| Sun Jan 3 | Resolution Relay: Bring Your Own Baton Half Marathon & Relay | Boring OR |
| Sun Jan 3 | Spring Hill Marathon Mania | Spring Hill FL |
Saturday, January 9
| Sat Jan 9 | All-Out Polar Prowl Half Marathon 10K & 5K | Arvada CO |
| Sat Jan 9 | Lake Mead Marathon Half Marathon 10K & 5K | Boulder City NV |
| Sat Jan 9 | River Road Run Half Marathon 10K & 5K | Canyon Lake TX |
| Sat Jan 9 | Run to Read Half Marathon | Fairmont WV |
| Sat Jan 9 | Watchung Winter Trail Marathon Half Marathon 50K & 10K | Mountainside NJ |
| Sat Jan 9 | Woolly Hollow Trail Half Marathon | Greenbrier AR |
Sunday, January 10
| Sun Jan 10 | Brandon Half Marathon & 5K | Brandon FL |
| Sun Jan 10 | Del Dios Half Marathon 10K & 5K | Escondido CA |
| Sun Jan 10 | Mobile Marathon Half Marathon & Relay | Mobile AL |
Monday, January 11 – Friday, January 15
| Fri Jan 15 | Rally in the Valley of Fire Half Marathon | Overton NV |
Saturday, January 16
| Sat Jan 16 | Charleston Marathon Half Marathon & 5K | Charleston SC |
| Sat Jan 16 | Chilly Willy Half Marathon 10K & 5K | Sugar Hill GA |
| Sat Jan 16 | Daufuskie Island Marathon Half Marathon & Ultra | Daufuskie Island SC |
| Sat Jan 16 | Hollywood Beach Half Marathon & 5K | Hollywood FL |
| Sat Jan 16 | Museum of Aviation Marathon Half Marathon & 5K | Warner Robins GA |
| Sat Jan 16 | Rally in the Valley of Fire Half Marathon | Overton NV |
| Sat Jan 16 | St. George Half Marathon & 5K | St. George UT |
Sunday, January 17
| Sun Jan 17 | 3M Half Marathon | Austin TX |
| Sun Jan 17 | Chevron Houston Marathon & Aramco Half Marathon | Houston TX |
| Sun Jan 17 | Key West Half Marathon & 5K | Key West FL |
| Sun Jan 17 | Louisiana Marathon & Half Marathon | Baton Rouge LA |
| Sun Jan 17 | Maui Oceanfront Marathon Half Marathon 15K 10K & 5K | Lahaina HI |
| Sun Jan 17 | McAllen Marathon & Half Marathon | McAllen TX |
| Sun Jan 17 | Naples Daily News Half Marathon | Naples FL |
| Sun Jan 17 | Prairie Dog Half Marathon 10K & 5K | Louisville CO |
| Sun Jan 17 | Rally in the Valley of Fire Half Marathon | Overton NV |
| Sun Jan 17 | Rose Bowl Half Marathon & 5K | Pasadena CA |
| Sun Jan 17 | Shark Bite Half Marathon | New Smyrna Beach FL |
| Sun Jan 17 | St. Pete Beach Classic Half Marathon 10K & 5K | St. Pete Beach FL |
Monday, January 18 – Friday, January 22
| Thu Jan 21 | Aloha Series Marathon Half Marathon 50K 10K & 5K – Day 1 | Kapa'a HI |
| Fri Jan 22 | Aloha Series Marathon Half Marathon 50K 10K & 5K – Day 2 | Kapa'a HI |
Saturday, January 23
| Sat Jan 23 | Aloha Series Marathon Half Marathon 50K 10K & 5K – Day 3 | Kapa'a HI |
| Sat Jan 23 | Oracle Rumble Half Marathon 50-Mile 50K 12K & Relay | Oracle AZ |
| Sat Jan 23 | Snow Bird Challenge Marathon Half Marathon Relay 50K & 10K | Seneca SC |
| Sat Jan 23 | Urban Ultra 50K Marathon Half Marathon 10K & 5K | Dallas TX |
Sunday, January 24
| Sun Jan 24 | Aloha Series Marathon Half Marathon 50K 10K & 5K – Day 4 | Kapa'a HI |
| Sun Jan 24 | Miracle Match Marathon Half Marathon & 10K | Waco TX |
| Sun Jan 24 | Saratoga Classic Half Marathon & 5K | Jacksonville FL |
| Sun Jan 24 | SHE Power Half Marathon & 5K | Chandler AZ |
| Sun Jan 24 | Sombrero Half Marathon | Simi Valley CA |
Saturday, January 30
| Sat Jan 30 | Arches Ultra 50M 50K Half Marathon & 9K | Moab UT |
| Sat Jan 30 | Florida Run at Lake Louisa State Park Half Marathon 10K & 5K | Clermont FL |
| Sat Jan 30 | Frostbite Half Marathon 10K & 5K | Starkville MS |
| Sat Jan 30 | Skydive Ultra Run | Clewiston FL |
| Sat Jan 30 | Sun Marathon Half Marathon 10K & 5K | Santa Clara UT |
| Sat Jan 30 | Too Cold to Hold Half Marathon 10K & 5K | Dallas TX |
| Sat Jan 30 | Yuma Territorial Marathon Half Marathon & 10K | Somerset AZ |
Sunday, January 31
| Sun Jan 31 | Big Beach Marathon & Half Marathon | Gulf Shores AL |
| Sun Jan 31 | Clearwater Running Festival | Clearwater FL |
| Sun Jan 31 | Harley Half Marathon | Biloxi MS |
| Sun Jan 31 | Miami Marathon & Half Marathon | Miami FL |
