The Best Races - Centennial

The Best Races: International Sloth Day Run in the Denver/Aurora area offers 5K, 10K, and 13.1-mile options at Piney Creek Hollow Park in Aurora, CO. The vibe is playful and low-stress: a small, private-group run with no timing chips and a no-time-limit policy, organized in wave-style starts with limited capacity to keep things relaxed for all ages and abilities. No special gear is required, and coordinators provide support throughout.

Participants receive a swag bag including a mailed T-shirt, a finisher medal, towel or giveaway, and a digital training pack, plus online results. A virtual option and local running-club invitations are also available. Visit the organization's website for the most recent information.