Event Description

The Bear Creek Lake Park Backyard Ultra is a last-runner-standing race in Lakewood, Colorado. Runners complete a 4.16-mile loop every hour, on the hour, starting at 8:00 AM on October 31. Anyone not back at the start line and ready to go out again when the next hour begins is finished. The race continues until one runner is left standing, or until the field is stopped by the hard park-closure cutoff. Capped at 50 runners.

Details section

Date: October 31, 2026
Start time: 8:00 AM, first loop begins on the hour
Location: Bear Creek Lake Park, Lakewood, CO
Format: Backyard ultra (last runner standing), 4.16-mile loop repeated hourly
Entry fee: $65 ($10 Park Entry Fee Included In This Price)
Field cap: 50 runners
Aid: One aid station at the start/finish, available every lap
Cutoff: Final lap begins 6:00 PM due to park closing hours

Event's current local time: 2:22 AM MT