In 137 days · Sat, Mar 6, 2027
Don't let race day sneak up
One email during race week. That's it.
Saturday, March 6th, 2027
Seneca Creek State Park (Nuthatch Pavilion), Gaithersburg MD
Marathon · Ultra
34–53°F · some rain risk
See last 10 years
On this date: rain 4 of the last 10 years
2026
42–54°F
rain
2025
37–51°F
dry
2024
45–52°F
rain
2023
31–55°F
dry
2022
46–72°F
rain
2021
26–41°F
dry
2020
33–50°F
dry
2019
17–26°F
dry
2018
24–44°F
rain
2017
28–53°F
dry
Best months to race in Maryland →
About this 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 "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!
Course map
Train with a club
Run clubs near Gaithersburg to train with before race day.
Suggested Races
Organize this race?
Claim it free to manage your listing — and get it featured for free, while spots last.