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
$85.00
Closed

Janet Braunstein 5 Miler

Oct 03, 2026 8K 7:20 AM
$40.00
Closed

Typical race-day weather

Based on 7 years of Open-Meteo archive data for this event's race dates in Potomac, plus the 3 days either side.

Temp (°C)
Minimum temperature (race-week average) 12.2° / Maximum temperature (race-week average) 20.7°
Feels Like (°C)
Minimum feels like — heat index / wind chill (race-week average) 11.1° / Maximum feels like — heat index / wind chill (race-week average) 21.3°
Peak wind (km/h)
Strongest wind of the day (race-week average)
15.8
Precip (mm)
Precipitation over the day (race-week average)
3.2mm
Humidity
Mean relative humidity (race-week average)
75.6%
Sunrise
Sunrise at the start line on October 3, 2026 (EDT)
Sunset
Sunset at the start line on October 3, 2026 (EDT)
Daylight
Hours between sunrise and sunset on race day
11h 41m

The sun rises at 7:06 AM and sets at 6:48 PM local time (EDT) in Potomac on October 3, 2026 — 11h 41m of daylight.

Course

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

Done this event?

If you've participated in this event, share your experience with other runners

2026 results — National Capital 20 Miler and Janet Braunstein 5 Miler

192 finishers across 2 distances · leading places in the National Capital 20 Miler

View all results
Leading finishers of the 2026 National Capital 20 Miler and Janet Braunstein 5 Miler
Place Name Time Pace
1 Matthew Sarge 2:01:47 6:05 /mi
2 Jeffrey Redfern 2:08:19 6:25 /mi
3 Mike Smith 2:10:52 6:33 /mi
4 Brian Crandall 2:14:04 6:42 /mi
5 Jilane Petrie 2:19:08 6:57 /mi

Every finisher is on the results page, filterable by distance, gender and age group.

All results by year

2026 edition View Results
2025 edition View Results

Other races near Potomac

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

🏃 Plan Your Next Race in Potomac

Find upcoming events by distance:

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, 10 Potomac events

Spotted something wrong? Tell us and we'll fix it.