Rosaryville Ramble Half
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Rosaryville Ramble 5k, 10k & Half
This event offers trail and road race options at Rosaryville State Park in Upper Marlboro, MD, with three official distances:
- 5k
- 10k
- Half marathon
The course begins on paved and gravel roads and includes scenic single-track trail sections with rolling hills. The 10k is two laps of the 5k course. Water stations are placed at approximately mile 1 for the 5k; miles 1, 3.1, and 4.1 for the 10k; and miles 1, 2, 4.3, 7.1, 8.1, and 10.4 for the half. Gatorade is available at some stations. Restrooms are onsite.
Runners receive a finisher’s medal, a technical (Drifit) event shirt, and chip timing. T-shirts are guaranteed for registrations completed before February 17; extras are available first-come first-served. Live results are posted on Athlinks and via a QR code at the race; final results with series points are posted the Monday after the event.
The race benefits the Rosaryville Conservancy. Points count toward Year-Long 5k, 10k, Endurance, and Back of the Pack series and toward the Winter Series. Back of the Pack time is 13:00; the series groups runners with similar average paces.
Registration fees are tiered through January 31 and increase on race morning by $5 per distance. A virtual race option is available. There is a daily park entry fee payable by participants. Parking is at Rosaryville State Park, GPS 38.780445, -76.812378. Visit the organization's website for the most recent information.
