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All-Out Fall Fest

Name: All-Out Fall Fest
Start: 2026-09-19
End: 2026-09-19
Location: Westminster, Colorado

location_city Westminster

location_on Colorado

flag United States

calendar_today 19 Sep, 2026

directions_run Running

language Official Website

About the Event

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.

Races Offered

Half Marathon

Sep 19, 2026

straighten

Distance — 13.1 Miles

terrain

Type — Road running

timer

07:00

VIRTUAL 10K

Sep 19, 2026

straighten

Distance — 10K

terrain

Type — Road running

timer

07:00

VIRTUAL 5K

Sep 19, 2026

straighten

Distance — 5K

terrain

Type — Road running

timer

07:00

VIRTUAL Half Marathon

Sep 19, 2026

straighten

Distance — 13.1 Miles

terrain

Type — Road running

timer

07:00

10K

Sep 19, 2026

straighten

Distance — 10K

terrain

Type — Road running

timer

07:30

5K

Sep 19, 2026

straighten

Distance — 5K

terrain

Type — Road running

timer

07:40

Weather Overview

These values represent the 3-year monthly averages for September in Westminster.

Temp (°C)

Feels Like (°C)

thermostat 10.6° / 28.3°

wb_sunny 8.2° / 24.6°

Wind (km/h)

Humidity (%)

air 8.2 /

water_drop 44.2%

Temp (°C)

Feels Like (°C)

Wind (km/h)

Humidity (%)

thermostat 10.6° / 28.3°

wb_sunny 8.2° / 24.6°

air 8.2 km/h

water_drop 44.2%

About 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.