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Founders Half Marathon

calendar_today 13 Dec, 2026

directions_run Running

language Official Website

sell $10.00

Founders Half Marathon

About the Event

The lowest-priced half-marathon in America! Still a full 13.1 miles and full-service on quality and support!

This is race #2 of the DCRR Snowball Series. In past years, it's been the Gar Williams Half Marathon; now it honors all the Club's founders. 

Course: Out-and-back along C&O Canal Towpath. Previously-USATF certified course, click here for map. We intend to recertify the course before race day, subject to completion of construction in the vicinity of Canal Lock 5. We'll make sure the course is accurately measured to account for the slightly-different path through the construction site if they're still digging. 

Water Stops: There will be two water stops: one at Lock 10 and one at Lock 6. These locations correspond to approximately mile 3, 5, 8, and 10 of the race. You will run by each water stop twice.

Registration: Online registration only.

Timing and Results: Timing and results will be compiled on a real-time basis and friends and family will be able to track runners throughout the race via social media.

We will provide a link for live results in our final instructions to runners..

Fees: Online advance registration through 24 hours before the race (9:00 AM on 12/12). After that, late registration will be open until the moment the race begins, at a slightly higher price.
¶ Advance registration: $0 for DCRRC members, $10 for non-members.
¶ Late registration: $5 for DCRRC members, $15 for non-members.

Refund policy for Snowball Series: In the event the race is canceled, pre-paid non-members will receive a credit to be applied to a future Snowball Series race.

Location: Carderock Recreation Area (not Park), Carderock, MD. 

Raceday Timeline:
7:30 Packet Pickup opens
9:00 Race Start
11:00 Awards
12:00 Course Closes

Amenities and extras: We will have a great breakfast spread post race, including bagels, cream cheese, Nutella, PB&J, hot chocolate, coffee, tea, Gatorade, bananas, and more.  

T-shirts and Medals: Come on people, it's a $10 race... No, there are no t-shirts or medals. 

Directions: Take the Capital Beltway (I-495), to the Clara Barton Parkway headed west, outside the beltway.  Make a right on the first exit which is for both Carderock and the Naval Surface Warfare Center (Carderock Division). Turn left at the stop sign at the top of the ramp to cross the parkway. After passing under the canal, turn right and proceed to the last parking lot. If it's full, park in one of the other lots and walk back to our registration area. 

Volunteers: We need many volunteers to help coordinate the race events. Please "pay it forward" by helping if you're not running, or have a friend or relative volunteer. Remember, this counts as your Snowball Series volunteer requirement.

Races Offered

Half Marathon

Dec 13, 2026

straighten

Distance — 21.1K

terrain

Type — Running

timer

09:00

sell

$10.00

Weather History

These values represent the 3-year monthly averages for December in Potomac.

thermostat Temperature
-0.2° / 7.7°
wb_sunny Feels like
-4.7° / 3.7°
light_mode Avg sunshine hours
5h 42m
water_drop Avg rainfall
3.7 mm
ac_unit Avg snowfall
0.1 cm
air Avg wind speed
11.6 km/h (Light breeze)
opacity Sweat loss rate
Low
terrain Course conditions
Firm and slightly soft
sunny Max UV Index
Low (2.0)
humidity_mid Humidity
69.9%
wb_twilight Sunrise
08:19
nightlight Sunset
17:48

About Potomac

Learn more about the host city, Potomac.

Scenic view of

Potomac is an unincorporated district in Montgomery County, Maryland and a suburb of Washington DC.

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Hotels & Places to Stay

Video

Watch highlights and course previews from previous years.

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