Get ready for a ghoulishly good time at the MonsterDash Run - Denver on Saturday, October 24, 2026! This beloved Halloween-themed event, held at Denver's picturesque Sloan's Lake Park, offers distances for everyone: a 10K, 5K, and a 1-Mile Kids Race. Runners will enjoy a fast, flat road course that loops around Sloan's Lake, providing stunning views of the Rocky Mountains and vibrant fall foliage. Typical race day conditions for late October see pleasant highs around 64°F and lows around 33°F, with a minimal 5% chance of precipitation, creating ideal running weather.

What truly sets the MonsterDash apart is its incredible festive atmosphere and commitment to family fun. Known for its annually changing themes, the race encourages a high percentage of participants—up to 75%—to run in creative costumes, with prizes awarded for categories like Best Family, Most Creative, and even Best Clowns. The 10K features three well-stocked water stops along its two loops, while the 5K has one aid station providing water, sports drinks, and snacks.

Beyond the race itself, the MonsterDash transforms the finish area into a lively carnival-style festival. Expect scary music, a variety of local vendors, and plenty of post-race treats like popcorn, cotton candy, and hot dogs. Kids can enjoy their dedicated mile race and carnival games, while adults can partake in a pie-eating contest or snap photos at the selfie wall. As one of only a handful of races permitted at Sloan's Lake, the MonsterDash promises a memorable and spirited experience for runners, walkers, strollers, and even dogs.