Race Discovery
National Capital 20 Miler and Janet Braunstein 5 Miler
National Capital 20 Miler and Janet Braunstein 5 Miler logo

National Capital 20 Miler and Janet Braunstein 5 Miler

Potomac, Maryland, United States View on map
Oct 03, 2026 (America/New_York local time)
Running

About this race

The National Capital 20 Miler is Washington, DC’s premier fall marathon tune-up race. Taking place on the C&O Towpath, the race offers runners a flat, fast out-and-back course with water and nutrition support at regular intervals. Runners may choose the 20 Miler or 5 Miler option. All runners receive race swag. 

Members of DC Road Runners receive $15 off the price of the 20 Miler and $5 off the price of the 5 Miler. Make sure you are logged into the same RunSignUp account that you used for your membership to receive the discount.  

Janet Braunstein 5 Miler Awards

  • Overall Male and Female: 1st Place: $15, 2nd Place: $10, 3rd Place: $5

National Capital 20 Miler Awards

  • Overall Male and Female: 1st Place: $150, 2nd Place: $75, 3rd Place: $50
  • Masters, Overall Male and Overall Female: $50 each
  • We will have age group awards three deep. (19 and under, 20–29, 30–39, 40–49, 50–59, 60–69, and 70 and over)

Pick your distance

Running

National Capital 20 Miler

Oct 03, 2026 32.2K 7:00 AM
$75.00
Open

Janet Braunstein 5 Miler

Oct 03, 2026 8K 7:20 AM
$35.00
Open

Typical race-day weather

Based on 2 years of historical conditions on this event's race dates in Potomac.

Temp (°C)
Minimum temperature (race-day average) 10.9° / Maximum temperature (race-day average) 23.3°
Feels Like (°C)
Minimum feels like — heat index / wind chill (race-day average) 10.9° / Maximum feels like — heat index / wind chill (race-day average) 23.3°
Wind (km/h)
Average wind speed (race-day average)
24.8
Precip (mm)
Average precipitation (race-day average)
2.6mm
Humidity
Average relative humidity (race-day average)
62.0%

Course

Route map and elevation profile

No course map published yet.

The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.

Reviews

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Other races near Potomac

Different organizers, within 40 miles, in the next three months

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Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.

  • Entries, prices, waves and inclusions — the event's official registration page
  • Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
  • Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
  • Comparisons and counts — Race Discovery calendar, 9 Potomac events

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