Marathon

Road

MCRRC Seneca Creek Greenway Trail Marathon & 50K

Q: How hard is the MCRRC Seneca Creek Greenway Trail Marathon & 50K Marathon?

MCRRC Seneca Creek Greenway Trail Marathon & 50K is a Marathon on a road course in Gaithersburg, Maryland. We don't have a verified elevation profile yet — check the organizer's course map for the climb breakdown.

Q: What should I wear for the MCRRC Seneca Creek Greenway Trail Marathon & 50K?

Race-day weather in Gaithersburg can swing year over year, so dress for the forecast on the day. As a rule of thumb, dress for ~10°F warmer than the standing temperature once you start running. Layer with a throwaway long-sleeve at the start, gloves and a hat for sub-50°F mornings, and a singlet plus a visor when it climbs above 60°F. The published start time is 7:30 AM. Check the race-day weather forecast on this page closer to the date for a specific recommendation.

Q: When does the MCRRC Seneca Creek Greenway Trail Marathon & 50K sell out?

MCRRC Seneca Creek Greenway Trail Marathon & 50K hasn't published a hard registration deadline. Most races of this size raise the entry fee in tiers (early-bird, regular, late) and can sell out without warning — sign up early if you're committed.

March 7, 2026

Gaithersburg, Maryland

Rolling Course

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About the Race

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 &#3...

Course Profile

Course profile data unavailable for this race.

Course features

Terrain

road

Surface

Road

Elevation gain

Not measured

Course type

Not stated

Field size

Unknown

Boston qualifier

Course map

Not yet published

Elevation profile

Not measured

Accessibility & inclusion

Walker-friendly

Stroller-friendly

Dog-friendly

Kids race

Vibe & community

We don't have vibe tags for this race yet — organizers can claim the listing to add them.

No charity partner listed.

History & past results

Years running

Unknown — claim to add

Recurrence

Annual (assumed)

Past finisher times and year-over-year participation will appear here once the organizer publishes them.

Reviews

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Common questions

How hard is the MCRRC Seneca Creek Greenway Trail Marathon & 50K Marathon?

We don't have a verified elevation profile yet — check the organizer's course map for the climb breakdown.

What should I wear?

Dress for ~10°F warmer than the standing temperature once you start running. Throwaway long-sleeve at the start, gloves and a hat for sub-50°F mornings, singlet plus visor when it climbs above 60°F. The race-day forecast above is the source of truth closer to the date.