All-Out Fall Fest

SEP
19
2026
Experience the scenery of Standley Lake and the Flatirons during this annual running event in Westminster. Choose between 5K, 10K, and Half Marathon distances on the Big Dry Creek Trail.
Sat 19 Sep 2026
13 miles 10 kilometers 5 kilometers

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Event Overview

The All-Out Fall Fest is an annual running event held in Westminster, Colorado. The race courses utilize the Big Dry Creek Trail and Standley Lake Regional Park, offering views of the lake and the Flatirons. Participants can choose between three primary distances on out-and-back courses.

Distance Options

The event features the following distances:

  • Half Marathon: A 13.1-mile route through the park.
  • 10K: A 6.2-mile course on the Big Dry Creek Trail.
  • 5K: A 3.1-mile distance following the local trail system.

Course Details

The Half Marathon begins by heading west toward Standley Lake Regional Park. This route includes four miles of gravel trails and road systems within the park property, including a sections near the dam and the south trailhead. The course provides eight fueling stations and four portable toilets along the route.

The 10K and 5K participants leave from the central parking lot and head west on the Big Dry Creek Trail. The 10K turnaround is located 3.1 miles out, while the 5K turnaround is at 1.55 miles. These courses feature four and two fueling opportunities, respectively.

Virtual Participation

Remote options are available for all three distances. Virtual participants receive a distance medal and event materials via mail. Completion of the virtual race counts toward the Run Amok Championship and series finisher awards. Visit the organization's website for the most recent information.

13 mi
Half Marathon
10 km
10k
5 km