National Capital 20 Miler and Janet Braunstein 5 Miler
National Capital 20 Miler and Janet Braunstein 5 Miler is a running race on October 3, 2026 in Potomac, MD, with entry fees from $35 to $65.
- Date
- October 3, 2026 (72 days to go)
- Price
- $35–$65
- Sport
- Running
From the Organizer
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)
Events
Weather
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
71°
Typical Low
53°
Chance of Rain
29%
Based on US Climate Normals data from Rockville 1 Ne, 5 mi from the venue.
Host City
About Potomac, MD
City Elevation
445 ft
Nearest Airport
IAD
Washington Dulles International Airport · 17 mi
Time Zone
Eastern Time
From Endurance Grid
Line up lodging and travel early to lock in your race weekend.
Race Location
Your Next Start Line
What Are You
Waiting For?
Every finish line starts with a single decision. Claim your spot at National Capital 20 Miler and Janet Braunstein 5 Miler, put it on the calendar, and turn “someday” into a start date.
72
Days to train
- Race
- National Capital 20 Miler and Janet Braunstein 5 Miler
- Date
- October 3, 2026
Want more races like this?
Enter your email and we'll send more your way.
From Endurance Grid
About This Sport
Endurance Grid is here to help you understand the sport, decide if it’s the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer’s event page.
With running, there's a distance for every fitness level, a community at every start line, and nothing beats the feeling of crossing a finish line you trained for.
Running is an endurance sport that rewards consistency, and showing up every week compounds in ways that will surprise you.
Running
From 5K to marathon, running races are an accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Coming Up
More Running races near Potomac, MD
Age-Graded 4-Miler
4 Mile · From $10 · Across the Clara Barton Parkway from 9500 MacArthur Blvd.
4 miles away
MCRRC Fall 10 Mile Program
10K · From $90 · Varies
4 miles away
MCRRC Fall 5K Run/ Walk Program
5K · From $65 · Varies
4 miles away
Parks Half Marathon
Half Marathon · From $100 · Metro Overpass
4 miles away
Plan your trip
Make it a Racecation
Coming from out of town? There's more to Potomac than race day. We'll help you line up nearby lodging, flights, a rental car, and things to do so you can make the most of your racecation.
Plan your trip to PotomacFrequently Asked Questions (FAQs)
What is the National Capital 20 Miler and Janet Braunstein 5 Miler?+
When and where is the National Capital 20 Miler and Janet Braunstein 5 Miler?+
How do I register for the National Capital 20 Miler and Janet Braunstein 5 Miler?+
National Capital 20 Miler and Janet Braunstein 5 Miler
Oct 3, 2026