MCRRC Seneca Creek Greenway Trail Marathon
North Potomac, United States • 7 Mar 2026
Event overview
The MCRRC Seneca Creek Greenway Trail Marathon & 50K takes place on Saturday, March 7, 2026, in Gaithersburg, Maryland. The course uses the Seneca Creek Greenway Trail and parallel trails, including single-track sections through Montgomery County parkland. The race start and finish are at Seneca Creek State Park (Nuthatch Pavilion), 11950 Clopper Road, Gaithersburg, MD 20878. Participants may choose their final distance during the event by stopping at the finish for the marathon or continuing on to complete the 50K.
Entries and race goods
Events offered:
- Marathon
- 50K
Both events list an entry fee of $68 and are open to ages 18 and older. The listing notes that entry fees will increase after stated dates. Registered participants receive a custom race bib, a short-sleeved technical shirt, and a finisher's medal. Current MCRRC members are eligible for a $5 discount that is applied automatically at checkout when signed in. The event page provides directions and additional race information, including aid station and course logistics pages. Visit the organization's website for the most recent information.