2027 Rosaryville Half Marathon and 10K

Race Information

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, this racecourse is perfect for an early-season trail running race. The racecourse 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.

👍 Run Pick of the Month: Baltimore 10 Miler

📍Druid Park Lake - Baltimore, MD - June 6th, 2026

Celebrate the start of summer and the strength of Baltimore’s running community at the Baltimore Ten Miler, a destination race set against the unforgettable backdrop of the Maryland Zoo in Baltimore.

💸 Exclusive $15 Off! Use Code: Run26Guide

Why you’ll love the Baltimore Ten Miler:
✅ Under Armour race shirts & zoo-themed medal
✅ Post race watermelon, cold towels and live music
✅ Summer vibes and strong community energy

Runners start and finish in Druid Hill Park, and cross the finish line in a celebratory atmosphere that feels equal parts accomplishment and party. Expect high fives, smiles, and a post-race celebration that captures everything we love about running together.

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