There are 41 half marathons in Oklahoma scheduled for 2026. The next is the Tulsa River Run in Tulsa on October 17. Oklahoma half marathons run primarily October through September.

Dirtie Birdie Trail Run

Sat, Nov 7 · Norman, OK Norman
Sasquatch - 3 MILERBig Foot - 6 MILER - 2 Person RELAY (each person runs a 3 mile loop)Big Foot - 6 MILER +3

Stormin' Norman Run

Sun, Mar 7 · Norman, OK Norman
Stormin' Norman F1-Fun Run - CancelledStormin' Norman EF-5K - WheelchairStormin' Norman EF-5K +13