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

Seneca Creek Greenway Trail Race
Saturday, March 3, 2018 @ 7:00am



Race day 2018 is fast approaching! Runners: prepare for muddy trails and bring a water bottle! We still need a few more volunteers.

2018 Bib Numbers

Please read below for more information on the location, course, and post-race.

Registration: Registration is full. Individual runners choose at the decision point (~27.7 miles) to finish the “marathon” (~28 miles) or run a loop around Clopper Lake to complete a 50k. The relay follows the 50k course. The registration fee covers the post-race picnic. The registration fee does not include a race shirt, which can be purchased for an additional fee during registration. Unfortunately, we are unable to offer refunds or bib exchanges if you change your mind — even if the race is canceled 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!

Start/Finish/Relay Locations, Parking, & Bib Pickup

The marathon, 50k, and 1st leg relay runners will start at 7:00am. The 2nd leg relay runners start at the relay exchange (~14 miles out) and run the remaining ~18 miles along the 50k route.

Start/Finish: Seneca Creek State Park, 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: Following signs to the race parking after you pass the gatehouse (turn right, then go 3/4 of a mile to sign for Nuthatch & Bluejay). 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.

The Chip: Please ensure your bib is visible on your front at all times during the race. 2018 Bib Numbers

Relay Exchange: The bib/chip exchange between the 1st and 2nd relay runners will occur at ~14 miles on the course. The relay exchange will be on Seneca Rd (Google:  39.079140, -77.336169). Transportation for relay participants to/from the exchange is not provided. Course marshals will be at the exchange. You will need to coordinate with your relay partner for transportation to/from the relay exchange, such as having Runner 2 drive to the exchange, and then Runner 1 driving back to the finish.

Course Description, Aid Stations, & Cut-off Times

Course Maps: Please check out our course maps  (GoogleStravaHelloDrifterJpeg image) – with markers for parking, start, aid stations, relay exchange, decision point (marathon vs. 50k), and finish. The course will be single track dirt trails on rolling hills, with a total elevation gain of ~ 2200ft. Please note the “marathon” is closer to 28 miles. Expect mud, ice, rocks, roots, and slick crossings – be careful!

The marathon, 50k, and 1st leg relay runners will start at 7:00am. Individual runners choose at the decision point (~27.7 miles) to opt for the “marathon” (~28 miles) or run a loop around Clopper Lake to complete a 50k. After 2:25 pm, the 50k option is no longer available at the decision point, and all remaining runners are diverted for a “marathon” finish.

Aid Stations: Spaced every 5-8 miles, with water, snacks, and lemon Gatorade. This is a cup-free event – runners must bring a water bottle.

Aid station Distance Amenities Cutoff
Start 0 Porta-potties 7:00 am start
Rt 28 7.3 miles Drink, snacks, porta-potty
Relay Exchange 14 miles Water only, porta-potty
Berryville 15 miles Drinks, snacks, drop bags 11:30 am
Rt 28 19.5 miles Drink, snacks, porta-potty
Riffle Ford Rd. 26.8 miles Drink, snacks, porta-potty
Decision Point 27.7 miles (No-aid) 2:25 pm (for 50k and relay)
Marathon Finish ~28 miles Picnic @ Nuthatch Pavilion 4pm
50K ~31.9 miles Picnic @ Nuthatch Pavilion 4pm

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 relay exchange (~14 miles). If the second runner doesn’t not have a bib or chip at the finish they will not be scored.

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

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).


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 race is on single-track dirt trails that may be icy, snowy, muddy with rocks, roots, and slick wooden bridges — pay attention and be careful!

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 bib & chip to the aid station volunteer if you drop.

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


Picnic: Food and drink will be provided at the finish (Nuthatch Pavilion) for runners and volunteers. A limited selection of food will be provided for spectators as well — spectators please honor this limitation to keep food available for late-finishing runners.

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