See all January 2020 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.
Wednesday, January 1 – Friday, January 3
| Wed Jan 1 | Bling in the New Year Marathon & Half Marathon | Snohomish WA |
| Wed Jan 1 | Brazen New Year's Day Half Marathon 10K & 5K | Castro Valley CA |
| Wed Jan 1 | Chilly Willy Half Marathon 10K & 5K | Seekonk MA |
| Wed Jan 1 | Sawblade Texas Marathon & Half Marathon | Kingwood TX |
Saturday, January 4
| Sat Jan 4 | Buckeye Marathon Half Marathon 10K 5K & Obstacle Course | Buckeye AZ |
| Sat Jan 4 | Citrus Heritage Run Half Marathon 10K & 5K | Riverside CA |
| Sat Jan 4 | Freeze Your Half Off Half Marathon 10K & 5K | Chattanooga TN |
| Sat Jan 4 | Oregon Road Runners Club Y2K Half Marathon & 10K | Forest Grove OR |
| Sat Jan 4 | Run to Read Half Marathon | Fairmont VT |
| Sat Jan 4 | Swamp Forest Trail Marathon Half Marathon 50K & 6.5-Mile | Tallahassee FL |
| Sat Jan 4 | Twin Cities Polar Dash Half Marathon | St. Paul MN |
Sunday, January 5
| Sun Jan 5 | Beachside Half Marathon & 5K | Vero Beach FL |
| Sun Jan 5 | Dia De Reyes Half Marathon & 5K | Fresno CA |
| Sun Jan 5 | Freeze Your Half Off Half Marathon 10K & 5K | Chattanooga TN |
| Sun Jan 5 | Herb Parsons Trail Marathon & Half Marathon | Collierville TN |
| Sun Jan 5 | Spring Hill Marathon Mania | Spring Hill FL |
Saturday, January 11
| Sat Jan 11 | All-Out Polar Prowl Half Marathon 10K & 5K | Arvada CO |
| Sat Jan 11 | Charleston Marathon Half Marathon & 5K | Charleston SC |
| Sat Jan 11 | Irvine Half Marathon & 5K | Irvine CA |
| Sat Jan 11 | Lake Mead Marathon Half Marathon 10K & 5K | Boulder City NV |
| Sat Jan 11 | Some Like It Cold Half Marathon 10K & 5K | Knoxville TN |
| Sat Jan 11 | Times-Union Half Marathon & 5K | Jacksonville FL |
| Sat Jan 11 | Walt Disney World Half Marathon | Lake Buena Vista FL |
Sunday, January 12
| Sun Jan 12 | Hollywood Beach Half Marathon & 5K | Hollywood FL |
Saturday, January 18
| Sat Jan 18 | The Rain Run Half Marathon | Redmond WA |
| Sat Jan 18 | Revel Kulia Marathon & Half Marathon | Waikoloa HI |
| Sat Jan 18 | Run Holden Beach Half Marathon & 5K | Supply NC |
| Sat Jan 18 | St. George Half Marathon & 5K | St. George UT |
Sunday, January 19
| Sun Jan 19 | 3M Half Marathon | Austin TX |
| Sun Jan 19 | Chevron Houston Marathon & Aramco Half Marathon | Houston TX |
| Sun Jan 19 | Key West Half Marathon & 5K | Key West FL |
| Sun Jan 19 | Louisiana Marathon & Half Marathon | Baton Rouge LA |
| Sun Jan 19 | Maui Oceanfront Marathon Half Marathon 15K 10K & 5K | Lahaina HI |
| Sun Jan 19 | McAllen Marathon & Half Marathon | McAllen TX |
| Sun Jan 19 | Naples Daily News Half Marathon | Naples FL |
| Sun Jan 19 | Pasadena Half Marathon & 5K | Pasadena CA |
| Sun Jan 19 | Prairie Dog Half Marathon 10K & 5K | Louisville CO |
| Sun Jan 19 | Rock 'n' Roll Arizona Marathon Half Marathon & Mini Marathon | Tempe AZ |
| Sun Jan 19 | St. Pete Beach Classic Half Marathon 10K & 5K | St. Pete Beach FL |
| Sun Jan 19 | Tri-City Medical Center Carlsbad Marathon & Half Marathon | Carlsbad CA |
Monday, January 20 – Friday, January 24
| Thu Jan 23 | Aloha Series Marathon Half Marathon 50K 10K & 5K – Day 1 | Kapa'a HI |
| Fri Jan 24 | Aloha Series Marathon Half Marathon 50K 10K & 5K – Day 2 | Kapa'a HI |
Saturday, January 25
| Sat Jan 25 | Aloha Series Marathon Half Marathon 50K 10K & 5K – Day 3 | Kapa'a HI |
| Sat Jan 25 | Arches Ultra 50M 50K Half Marathon & 9K | Moab UT |
| Sat Jan 25 | Arena Attack Indoor Race Series – Hartford | Hartford CT |
| Sat Jan 25 | Callaway Gardens Marathon Half Marathon & 5K | Pine Mountain GA |
| Sat Jan 25 | Coyote Hills Half Marathon 10K & 5K | Fremont CA |
| Sat Jan 25 | Oregon Winter Half Marathon Quarter Marathon & 5K | Aloha OR |
| Sat Jan 25 | Skydive Ultra Run | Clewiston FL |
| Sat Jan 25 | Urban Ultra 50K Marathon Half Marathon 10K & 5K | Dallas TX |
Sunday, January 26
| Sun Jan 26 | Aloha Series Marathon Half Marathon 50K 10K & 5K – Day 4 | Kapa'a HI |
| Sun Jan 26 | Big Beach Marathon & Half Marathon | Gulf Shores AL |
| Sun Jan 26 | Clearwater Running Festival | Clearwater FL |
| Sun Jan 26 | Miracle Match Marathon Half Marathon & 10K | Waco TX |
| Sun Jan 26 | Publix Fort Lauderdale A1A Marathon & Half Marathon | Fort Lauderdale FL |
| Sun Jan 26 | SHE Power Half Marathon & 5K | Chandler AZ |
| Sun Jan 26 | Sombrero Half Marathon | Simi Valley CA |
| Sun Jan 26 | Town of Celebration Marathon & Half Marathon | Celebration FL |
