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Stone Mill 50 Mile Run

Gaithersburg, United States • 8 Nov 2025

The MCRRC Stone Mill 50 Mile Run is a challenging trail running event set in Montgomery County, Maryland, showcasing the scenic Seneca Greenway and Muddy Branch trails. Participants navigate a primarily single-track dirt course featuring forested, rolling terrain and small stream crossings. The event encourages community involvement, asking runners to volunteer with local running clubs or organizations prior to race day. The race is recognized for its commitment to trail running and offers commemorative awards for finishers celebrating milestone years. The next event is scheduled for November 8, 2025, at Stedwick Elementary School in Montgomery Village. 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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