Prepare for an exhilarating challenge at Riley's Rumble Half Marathon, set to test your mettle on July 26, 2026, in scenic Boyds, Maryland. This infamous 13.1-mile event, often touted as a crucial warm-up for fall marathons, is renowned for its demanding yet rewarding course through the rural countryside of Maryland's upper Montgomery County. Expect a low-key atmosphere focused squarely on the accomplishment of conquering this formidable half marathon.

The out-and-back course treats runners to a journey along the historic Chesapeake and Ohio Canal Towpath, nestled beside the Potomac River, starting and finishing from the South Germantown Recreational Park. While sections offer welcome shade, prepare for unshaded stretches and the race's signature: rolling hills that will truly earn the "rumble" in its name. Runners consistently describe it as one of the hardest half marathons they've experienced, with challenging ascents, especially in the later miles. Aid stations, generously spaced every two to three miles, provide water, Gatorade, and ice to combat typical race day conditions, which often see highs around 85F and lows around 66F, with humidity and sun. A unique highlight to anticipate is the popsicle station near the turnaround, a welcome, refreshing treat that runners rave about.

Riley's Rumble Half Marathon is not for the faint of heart or necessarily the first-time half marathoner; rather, it attracts those seeking a true test of endurance against hills, heat, and humidity. While you won't find finisher medals or event t-shirts, the immense satisfaction of completing this challenging course, supported by an exceptional team of volunteers, is its own reward. Fuel up at the finish line with watermelon, bananas, and other refreshments, celebrating a significant achievement that proves you're ready to rumble with the best.