Great Falls Half (Half/10k/5k)
Great Falls Half (Half/10k/5k) is a running race on November 21, 2026 in Potomac, MD, with entry fees from $55 to $70.
- Date
- November 21, 2026 (63 days to go)
- Location
- Great Falls Tavern, Potomac, MD
- Price
- $55–$70
- Sport
- Running
From the Organizer
Great Falls Half, 10K & 5K
Saturday, November 21, 2026 · Great Falls Tavern, Potomac, MD
Run the C&O Canal towpath along the Potomac, starting and finishing beside Lock 20 at Great Falls Tavern. All three distances head south along the canal past Widewater, Old Angler's Inn and Carderock, then turn for home. The towpath is flat, shaded crushed stone that was built for mules and is perfect for a fast fall race. Late November is the towpath's best season: the crowds are gone, the air is cool, and with the leaves down you get long views of the river.
Every runner is tracked live on Geo.Racing, so your people can follow you down the towpath and be at the line when you finish. Collect your medal, then walk the boardwalk to the Great Falls Overlook and watch the Potomac pour into Mather Gorge.
Start times: Half marathon at 12:00 PM, 10K at 12:30 PM, 5K at 1:00 PM. Finish line closes at 3:00 PM.
Every entry includes: a race shirt, a finisher medal, chip timing and results, aid stations on the towpath, and live GPS tracking. Awards go to the top three men and women at each distance.
Good to know: the field is capped under our National Park Service permit, so register early. The park charges $20 per vehicle (card only) at the Great Falls Tavern gate, and parking is limited, so carpool if you can. The towpath stays open to other walkers and cyclists: keep right and pass on the left.
Presented by Old Dominion Racing.
Events
Typical Conditions
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
54°
Typical Low
37°
Chance of Rain
29%
Based on US Climate Normals data from Rockville 1 Ne, 5 mi from the venue.
About Potomac, MD
City Elevation
445 ft
Nearest Airport
IAD
Washington Dulles International Airport · 17 mi
Time Zone
Eastern Time
From Endurance Grid
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Race Location
What Are You
Waiting For?
Every finish line starts with a single decision. Claim your spot at Great Falls Half (Half/10k/5k), put it on the calendar, and turn “someday” into a start date.
63
Days to train
- Race
- Great Falls Half (Half/10k/5k)
- Date
- November 21, 2026
- Location
- Great Falls Tavern, Potomac, MD
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About This Sport
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Running
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Frequently Asked Questions
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Great Falls Half (Half/10k/5k)
Nov 21, 2026