HalfRuns
DC · October 2026

Half Marathons in District of Columbia in October

2 half marathons in District of Columbia are on the calendar for October 2026, in Washington. Tap a race for the course, weather, past results and how to register.

ACE Physical Therapy & Sports Medicine Institute 23½th annual Potomac River Run Marathon & Half, in memory of Dean Shulman and Wendy Martinez logo

ACE Physical Therapy & Sports Medicine Institute 23½th annual Potomac River Run Marathon & Half, in memory of Dean Shulman and Wendy Martinez · Washington, District of Columbia

OCT 17
SF

Semper Fi 5K & Half · Washington, District of Columbia

OCT 24
All upcoming half marathons in District of Columbia→