Rosaryville Half Marathon
Upper Marlboro, United States • 28 Mar 2026
Rosaryville Half Marathon, 10K, 5K Trail Run
The event is scheduled for Saturday, March 28, 2026, at Rosaryville State Park in Upper Marlboro, MD 20772. It is produced by EX2 Adventures and includes both in-person and virtual options. The event offerings include the following distances:
- Half marathon
- 10K
- 5K
- Virtual half marathon
- Virtual 10K
- Virtual 5K
Course and format
The courses run on trails that wind through mixed hardwood forests and open fields. Trails are described as twisty, relatively smooth, and relatively flat. The half marathon course uses a 9 mile perimeter trail, a 2 mile interior trail, and wide open horse trails. The 10K course includes about 5 miles of the perimeter trail plus just over one mile of horse trails. The 5K uses part of the perimeter trail and some equestrian trails. Virtual entries allow completion off-site with registration that closes on March 28, 2026.
Additional information
The race lists City Kids as its charity partner. The event page notes referral rewards: refer 3 people for a $25 refund and refer 6 people for a second $25 refund. Further logistical details are available from the event organizer. Visit the organization's website for the most recent information.