Outdoor/Sporting EventLate September (single day)
Mountain Maryland 3M Challenge
The 3M Challenge is an annual multi-sport endurance event (biking, hiking/running, and paddling) organized by Mountain Maryland Trails along the Great Allegheny Passage and C&O Canal corridor near Cumberland. The 2026 event date has been set for September 26.
"A three-discipline endurance test through the Alleghenies"


































