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!
The Seneca Creek Greenway Trail Marathon and 50K is a low-key, low-priced, and fun-filled event along the beautiful Seneca Creek Greenway Trail and parallel trails. Marathon and 50K participants will have the option to choose their final distance during the race (either stop at the finish line for the "marathon" or keep going to complete the 50K).
All participants will receive a custom race bib, short-sleeved tech shirt, and a finisher's medal!
Mar 06, 2027
Distance — 50K
Type — Running
07:30
$70.00
Mar 06, 2027
Distance — 42.2K
Type — Running
07:30
$70.00
These values represent the 3-year monthly averages for March in Gaithersburg.
Learn more about the host city, Gaithersburg.
Gaithersburg is a city of 70,000 people (2020) in Montgomery County, Maryland. It is a suburb of Washington, D.C.
Read more launchTours and activities near Gaithersburg, powered by Viator.
Watch highlights and course previews from previous years.
Read what other athletes have to say about their experience at the MCRRC Seneca Creek Greenway Trail Marathon & 50K.
Be the first to share your experience with the community!
Spotted an error or missing detail about the MCRRC Seneca Creek Greenway Trail Marathon & 50K? Help us improve.
Explore other exciting events happening in this same region.
location_on Rockville, Maryland, US
calendar_today Oct 04, 2026
Hand-picked events we think you’ll love.
Oct 04, 2026
Who We Are: Healthy Kids Running Series is a five (5) week running program in the spring and fall for kids Pre-K throug…
Read more
Oct 04, 2026
This run is raced on trails (crosses a country road) within the boundaries of GSC habitat center.
Read more
Oct 04, 2026
NOTE -ENTRY AND DETAILS WILL BE POSTED IN EARLY SPRING 2026 5K run, and 1 mile walk will start and finish at Mantua VFW…
Read more
Oct 04, 2026
Kaizen + Team Hoyt Annual 5K, 8K & 10K Run • Ride • Push Join us for the Kaizen + Team Hoyt Annual 5K, 8K & 10K and exp…
Read more
