Mcrrc Seneca Creek Greenway Trail Marathon & 50K
Updated
Saturday, March 6, 2027, first start 7:30 AM, in Gaithersburg (Seneca Creek State Park (Nuthatch Pavilion)). Distances: Marathon, 50K. Entry from $70; the Marathon goes from $70 to $75 after December 31.
- Date
- Saturday, March 6, 2027
- Start time
- 7:30 AM (earliest wave)
- Location
- Seneca Creek State Park (Nuthatch Pavilion), Gaithersburg, DC 20878
- Area
- Maryland Suburbs, Washington, DC
- Distances
- Marathon50K
- Course
- Trail (dirt or single-track on at least part of the course)
- Price
- $70 plus the platform's processing fee
- Next price increase
- Thursday, December 31, 2026: Marathon $70 → $75
- Registration
- Open. Opened October 15, online signup closes Saturday, March 6, 2027
How to register
Registration is on RunSignup. Pick your distance, add any extras, and you'll get a confirmation email with your bib details. Sign up by December 31 to pay $70 instead of $75.
Course and race notes
Welcome to the Seneca Creek Greenway Trail Marathon & 50K, where you will experience some of Montgomery County's finest single-track trails. This is a challenging, but beautiful run for all!
From the race's own listing. Check the race website for the course map and parking.
Source: RunSignup public race API, refreshed 2026-10-17. Details can change; the registration page is the final word.