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Stone Mill 50 Mile Run

Gaithersburg, United States • 8 Nov 2025

Event

The MCRRC Stone Mill 50 Mile Run is scheduled for Saturday, November 8, 2025, in Montgomery Village, MD (zip 20886). The event is a 50-mile trail run that uses the Seneca Greenway and Muddy Branch trails. Registration is open, the listed entry fee is $89.08 (includes a $4.08 fee), and the event is open to ages 18 and older.

Course and participant information

The course runs on primarily single-track, dirt trail through forested, rolling terrain. There are small stream crossings. Most of the course drains well, but parts can be muddy in wet weather. The event start and finish area is listed at Stedwick Elementary School, 10631 Stedwick Road, Montgomery Village, MD.

Participants are asked, on the honor system, to commit to volunteering six or more hours before race day with a local running club, local race, trail work, or another running-related nonprofit. Sponsors mentioned for the event include ReEnvisionPT, Tailwind Nutrition, MCRRC, and Cloudsplitter Coffee. Visit the organization's website for the most recent information.

United States Maryland Gaithersburg

Race information

Website Registration
UTMB 50K
50 mi
50 Mile
Visit the organization's website for the most recent information.
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