Maryland might be small, but it packs a punch when it comes to half marathon variety. From rolling country roads to scenic trails along the Potomac, the Old Line State offers something for every kind of runner. This late summer and fall lineup is especially strong — with races spanning July through October, you have plenty of time to train, plan, and make a weekend of it.
Here are four standout half marathons to put on your calendar.
Parks Half Marathon
Sunday, September 27, 2026 — Rockville, Maryland
A perennial favorite with a quality score of 85, the Parks Half Marathon takes runners through Montgomery County’s paved trail system. The course is known for being fast and well-supported, making it a great choice for a PR attempt or a scenic long run with friends. September in Maryland is usually gorgeous — cool enough to race hard, warm enough to enjoy the post-race picnic.
MCRRC Riley's Rumble Half Marathon
Sunday, July 26, 2026 — Boyds, Maryland
If you're looking for a summer challenge, this one is worth the sweat. Riley's Rumble, organized by the Montgomery County Road Runners Club, has earned a quality score of 81. The course is hilly and rural, running through Black Hill Regional Park. It’s a lower-key, community-driven event that rewards grit — and the post-race barbecue doesn’t hurt.
Lock 2 Lock Marathon/Half Marathon/10k
Saturday, September 12, 2026 — Williamsport, Maryland
This race follows the C&O Canal towpath, offering a flat, shaded course perfect for a steady effort. With a quality score of 64, it’s a solid, no-frills race that lets you focus on the miles. The point-to-point route runs between two canal locks, giving you a taste of history along with your finish line.
Chestertown Challenge Half Marathon Run and 5K Run/Walk
Sunday, October 11, 2026 — Chestertown, Maryland
Head to Maryland’s Eastern Shore for this charming fall race (quality score 60). The course winds through historic Chestertown and past farmland, with flat terrain that invites a strong finish. October is peak foliage season, so expect colorful views and crisp air — ideal conditions for a late-season half.
Ready to find your next Maryland half? Check out the full list of upcoming races in the Half Marathons in Maryland directory. Whether you’re chasing a PR or a new state in your 50‑state quest, there’s a race here with your name on it.