See all September 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, September 2
Sunday, September 3
Sun Sep 3 | Aidspirit USA Marathon Half Marathon 10k & 5k | Harlowton MT |
Sun Sep 3 | Beach Day Half Marathon 15k 10k & 5k | Long Beach CA |
Sun Sep 3 | Boston Bound Marathon & Half Marathon | Johns Creek GA |
Sun Sep 3 | Bull Dam Trail Run Half Marathon 10k & 5k | North East PA |
Sun Sep 3 | Crystal Springs 50k Marathon 35k Half Marathon & 8k | Woodside CA |
Sun Sep 3 | Green Lake Half Marathon 10k & 5k | Green Lake WI |
Sun Sep 3 | Kauai Marathon & Half Marathon | Koloa HI |
Sun Sep 3 | Labor Day Triple Marathon Half Marathon 10k & 5k | Winter Park FL |
Sun Sep 3 | Mercer County Half Marathon | Robbinsville NJ |
Sun Sep 3 | Minocqua No Frills Marathon & Half Marathon | Minocqua WI |
Sun Sep 3 | NewBo Run Half Marathon & 10k | Cedar Rapids IA |
Sun Sep 3 | Oak Tree Half Marathon & 5K | Geneseo NY |
Sun Sep 3 | Sackets Harbor Marathon & Half Marathon | Sackets Harbor NY |
Sun Sep 3 | Uwharrie Dash Moonlight 5k Ten Miler and Double Feature Half | Albemarle NC |
Monday, September 4 – Friday, September 8
Mon Sep 4 | Labor Day Half Marathon 15k 10k & 5k | Santa Monica CA |
Mon Sep 4 | Labor Day Half Marathon | Parker CO |
Mon Sep 4 | Labor Day Triple Marathon Half Marathon 10k & 5k | Winter Park FL |
Mon Sep 4 | New Haven Road Race Half Marathon 20k & 5k | New Haven CT |
Fri Sep 8 | Old Forge Marathon Half Marathon 10k & 5k | Old Forge NY |
Saturday, September 9
Sunday, September 10
Saturday, September 16
Sunday, September 17
Saturday, September 23
Sunday, September 24
Monday, September 25 – Friday, September 29
Mon Sep 25 | Northwest Series Day 3 Marathon Half Marathon 10k & 5k | Clarkston WA |
Tue Sep 26 | Northwest Series Day 4 Marathon Half Marathon 10k & 5k | Clarkston WA |
Wed Sep 27 | Northwest Series Day 5 Marathon Half Marathon 10k & 5k | Lewiston ID |
Thu Sep 28 | GAP Marathon & Half Marathon | Frostburg MD |
Thu Sep 28 | Northwest Series Day 6 Marathon Half Marathon 10k & 5k | Lewiston ID |
Fri Sep 29 | Eastern Continental Divide Marathon & Half Marathon | Meyersdale PA |