MCRRC Riley's Rumble Half-Marathon

MCRRC Riley's Rumble Half-Marathon is held on July 25, 2027, in Boyds, Maryland, with a shorter 8 km option alongside. The half marathon (13.1 mi) starts at 7:30 a.m. The race has a long-standing reputation as one of the hardest in the region, on relentless hills and in full summer heat and humidity.

A course with that reputation is not one to run against the clock: pick an effort you could sustain in conversation for the first five miles, and judge your race on how much of the field you pass after mile ten. Runners who treat a hot, hilly half as a normal half marathon end up walking the last three miles — the ones who plan for it finish comfortably.