One of Colorado's favorite trails meets one of its most glorious parks at our 9th annual Fallfest! As courses wind southwest along Big Dry Creek Trail, the remarkable sight of Standley Lake with the Flatirons on the horizon will come into view. Its Endless Series sidekick in September is Beat the Heat.
Sep 19, 2026
Distance — 1 Miles
Type — Running
07:00
0.00
Sep 19, 2026
Distance — 26.2 Miles
Type — Running
07:00
0.00
Sep 19, 2026
Distance — 13.1 Miles
Type — Running
07:00
$60.00
Sep 19, 2026
Distance — 10K
Type — Running
07:00
$30.00
Sep 19, 2026
Distance — 5K
Type — Running
07:00
$25.00
Sep 19, 2026
Distance — 13.1 Miles
Type — Running
07:00
$40.00
Sep 19, 2026
Distance — 10K
Type — Running
07:30
$40.00
Sep 19, 2026
Distance — 5K
Type — Running
07:40
$30.00
Sep 19, 2026
Distance — 26.2 Miles
Type — Running
09:00
0.00
These values represent the 3-year monthly averages for September in Westminster.
Learn more about the host city, Westminster.
Westminster is a city of about 115,000 in the Denver Metropolitan Area of the western U.S. state of Colorado. The city lies northwest of Denver in Adams and Jefferson counties.
Read more launchRead what other athletes have to say about their experience at the All-Out Fall Fest.
Be the first to share your experience with the community!
Explore other exciting events happening in this same region.
location_on Westminster, Colorado, US
calendar_today Aug 23, 2026
location_on Westminster, Colorado, US
calendar_today Oct 03, 2026
Hand-picked events we think you’ll love.
Sep 26, 2026
The Oktoberfest 5K is back again this fall offering an active start to a festive weekend. Lace up your running shoes an…
Read more
Sep 28, 2026
World's Best Marathon & Half Series! No Time Limits Great Food Award-Winning Medals Loony Community! We RUN this countr…
Read more
Sep 29, 2026
World's Best Marathon & Half Series! No Time Limits Great Food Award-Winning Medals Loony Community! We RUN this countr…
Read more
Sep 26, 2026
Welcome to the most beautiful race in Nebraska! Runners from all over the country have described us as the friendliest,…
Read more
