Welcome to Seneca Creek Greenway Trail Marathon 25K, 50K, & Relay!

Seneca Creek Greenway Trail Race
Saturday, March 3, 2018


We appreciate your interest in the Seneca Creek Greenway Trail Events!

More information for the 2018 events will be coming soon! We’re still planning to start at Seneca Creek State Park, offer multiple distances, and offer great post-race food and drinks after!

Registration: Registration will open late November / December. Details will be posted. Unfortunately, we are unable to offer refunds or bib exchanges if you change your mind — even if the race is cancelled or moved due to weather.

Weather: March weather is unpredictable, please check the forecast and come prepared. While 2017 was near perfect, the race was rescheduled in 2015 due to a snowstorm!

Race Day

Race Location:
Nuthatch Pavilion (park map)

Seneca Creek State Park
11950 Clopper Road
Gaithersburg, MD, 20878

(Google map; GPS: 39.141111, -77.266222)

Directions: From I-270, exit at Clopper Rd W (MD 117). Proceed about 2 miles to the Seneca Creek State Park entrance on your left.

Parking: You will be directed to the parking area after you pass the gatehouse. Parking will be at the parking lot at the Nuthatch Pavilion and along the entry drive. Please follow the instructions of the parking volunteers. Please consider carpooling.

Packet Pick-up: Packet pick-up will be race day morning at Nuthatch Pavilion at the starting area.

Course Maps: Please check back for the course maps and elevation profiles. The course will be rolling hills, with a total elevation gain of ~ 2200ft.

Aid Stations: Spaced every 5-7 miles, with water, snacks, and lemon Gatorade.

Water bottles: Every runner is expected to carry their own water bottle. The aid stations will not have cups.

Bibs & Timing: We will use chip timing. The chips will be taped to the back of your bib — please remove and fasten it to the laces of one of your shoes. Relay participants will have 1 bib and 1 chip that will be exchanged at the hand-off point. If the second runner doesn’t not have a bib or chip at the finish they will not be scored.

Drop Bags: We will allow 1 bag drop if anyone needs a change of shoes or particular foods/drink. Put your items in an easily recognizable bag of your choosing CLEARLY marked with your name (easily identifiable makes for easily retrieved).

DNF’s: If for any reason you find yourself unable to finish your race, please make your way to the nearest aid station and let the volunteers know so we can get a ride for you back to the park. 

To account for all runners – please give your chip to the aid station volunteer if you drop.

Safety: Please carry a cell-phone. You must stop at road crossings — CARS a have the right-of-way! Course marshals may be present, but traffic does not stop. The trail may be icy, snowy, muddy with rocks, roots, and slick wooden bridges — pay attention and be careful!

Spectators: Crew, family, and friends are welcome in the park. There is limited parking for spectators at Black Rock Mill and Riffleford aid stations. Please no spectators at the 118 crossings. Pacers are not allowed.


Picnic: We will have our picnic at the finish line for all runners and spectators. Food and drink will be provided. Certain foods/beverages are set aside for runners & volunteers only! Please honor the volunteers who will be enforcing this policy.

Results and Photos: Results and free high-quality photos are typically posted to the MCRRC website with 24 hours of the race.