Saturday, November 21, 2026Potomac, MD
Great Falls Half (Half/10k/5k)
3 events
- Great Falls Half MarathonHalfRoadStarts 12:00 PM
- Great Falls 10k10KRoadStarts 12:30 PM
- Great Falls 5k5KRoadStarts 1:00 PM
Location
Approximate, from the race's ZIP code.
Typical race-day weatherIdeal weather · 92/100
- High / low
- 53° / 36°F
- 12° / 2°C
- Humidity
- 78%
- Dew point 37°F
- Chance of rain
- 24%
- Wind
- 10 mph
- Average
- Usually ideal weather for a half marathon.
Averages for this area and time of year over the last 20 years, from NASA POWER data. Not a forecast.