
Rosaryville Course Descriptions
Conveniently located right off the Capital Beltway, Rosaryville State Park in Upper Marlboro, MD offers fun and challenging terrain, that is also beginner friendly. Not overly technical in nature, this race course is perfect for an early season trail running race.
The race course at Rosaryville is beautiful and fun and winds through mixed hardwood forests and fields. The trails are twisty, relatively smooth, relatively flat and fast. The half marathon course includes the 9 mile perimeter trail, the 2 mile interior trail, and wide open horse trails. The 10K+ course includes 5 miles of the perimeter trail and just over one mile of wide open horse trails.
There are 4 aid stations on the 10K+ course and 9 aid stations on the half marathon+ course. All aid stations have cups, water, and gatorade. One aid station on the half marathon course also has snacks (~ 8.8).
Race Date: Sunday March 26, 2023
Course Length: 6.4 Miles (10K+) OR 13.4 Miles (HM+)
Elevation Gain: ~500 feet OR ~1,000 feet
Race Day Information Emailed to Racers
Race is sold out so no race day registration will be available


Registration Fees
Half Marathon
$70 – New year (by 1/1)
$75 – Early (by 1/26)
$80 – Regular (by 2/26)
$85 – Late (by 3/25)$90 – Race day
10K
$45 – New year (by 1/1)
$50 – Early (by 1/26)
$55 – Regular (by 2/26)
$60 – Late (by 3/25)$65 – Race day
Registration Fee Includes
Fun and challenging course design, sweet finisher medal, professional race operations, wonderful volunteer support, awesome aid stations, medical support, plentiful post-race food (breakfast burritos and other tasty treats – yum!), electric atmosphere, great music, awards and give-a-ways, and a race t-shirt you’ll love.
Race Day Schedule
7:30 – Check-in opens
8:50 – Half marathon pre-race brief
9:00 – Half marathon start
9:50 – 10K pre-race brief
10:00 – 10K++ start
10:45 – Post-race food available
11:45 – Free kids race*
12:00 – Awards (top 5 in each category) and sponsor give-a-ways
* Kids race is for ages 2-11. We split into age groups and run short out and back ‘race’. Kids who participate can pick from the Treasure Box.


Directions
Rosaryville State Park
7801 West Marlton Ave.
Upper Marlboro, MD 20772
From Virginia:
- Cross Woodrow Wilson Bridge on the outer loop of the Capital Beltway (I495) north to exit 11A, MD-4 South.
- Travel 3.1 miles then take right onto Woodyward Rd./MD-223 South.
- Travel .3 miles then take left onto Marlboro Pike/Osborne Rd. After .5 miles, Marlboro Pike changes to Osborne Rd.
- Travel 2.3 miles on Osborne Rd. to a right onto Crain Hwy/US-301 South.
- Travel .2 miles then take a right into the park, on West Marlton Ave.
From Baltimore and points north:
- Take the inner loop of the Capital Beltway (I495) south to exit 11A, MD-4 South.
- Travel 3.1 miles then take right onto Woodyward Rd./MD-223 South.
- Travel .3 miles then take left onto Marlboro Pike/Osborne Rd. After .5 miles, Marlboro Pike changes to Osborne Rd.
- Travel 2.3 miles on Osborne Rd. to a right onto Crain Hwy/US-301 South.
- Travel .2 miles then take a right into the park, on West Marlton Ave.
Race Rules
- Portable music players or any device requiring in-ear earphones are not permitted.
- Outside assistance is only permitted within 50 meters of an aid station.
- Race numbers must be worn on the front and must be visible at all times.
- Half marathon racers must maintain a minimum pace that will allow for a 4 hour maximum finish.
- Pets and Pacers are not allowed on the course.
- Baby strollers are not permitted on the course.
- Respect other racers, volunteers, race staff, and the environment. No littering.
- Poor sportsmanship may result in disqualification.
- Racers must notify race officials if they drop out of the race.
- Stay on designated trails.
Age Groups
Male and Female – 19-under, 20-29, 30-39, 40-49, 50-59, 60-69, 70-79
Additional Information
Ready to Race?
RegisterRaces
Spring Backyard Burn 5M/10M
Rosaryville Half Marathon/10K
Rails to River MTB Race
Fountainhead Half Marathon/10K
Loudoun 1725 Gravel Grinder
Blue Crab Bolt 5K/10K
XTERRA EX2 Tri/Du
Cranky Monkey MTB Race
Fall Backyard Burn 5M/10M
Rocky Gap 25K-50K-Relay
VentureQuest Adventure Race
Schaeffer Half Marathon/10M
Volunteer Sign-Up