MCRRC Riley's Rumble Half Marathon

Get ready to rumble at the MCRRC Riley's Rumble Half Marathon on Sunday, July 26, 2026, in scenic Boyds, MD. This infamous 13.1-mile event is renowned for its challenging yet rewarding experience, earning a reputation as a significant test of endurance in the summer heat. Typical race day conditions in late July feature highs around 85°F and lows around 66°F, with a 17% chance of precipitation, meaning runners should anticipate warmth and humidity.

The out-and-back course treats runners to rolling hills through rural Montgomery County countryside, starting and finishing along the historic Chesapeake and Ohio Canal Towpath, nestled beside the Potomac River. While early miles offer some downhill relief and shaded sections, the second half of the course includes unshaded stretches and formidable rolling hills that are "no joke." Aid stations strategically placed every two to three miles offer water, Gatorade, and ice to combat the summer conditions, with a much-anticipated "Popsicle Protocol" just after the turnaround between mile 8 and 9, a unique highlight of the race. Runners are advised to bring their own energy gels, as they are not provided on the course.

The Riley's Rumble is widely considered unsuitable for a first half marathon due to its demanding profile and summer timing, with a required pace not exceeding 15 minutes per mile. This popular event, attracting hundreds of participants annually, is known for its "low-key" atmosphere and forgoing traditional finisher medals, t-shirts, or awards, with organizers confident you won't need them to remember this memorable and challenging race. It’s a fantastic opportunity to test your limits and prepare for fall marathon events.