All-Out Fall Fest
- Date
- September 19, 2026
- Distance
- Half Marathon · 10K · 5K & more
From the Organizer
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.
Events
Weather
Typical Conditions
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
80°
Typical Low
48°
Chance of Rain
19%
Based on US Climate Normals data from Northglenn, 4 mi from the venue.
Host City
About Westminster, CO
Population
115,546
as of 2023
Elevation
5,551 ft
Nearest Airport
DEN
Denver International Airport · 19 mi
Time Zone
Mountain Time
From Endurance Grid
A mid-size host city. Enough lodging and amenities to keep race weekend easy, without big-city sprawl.
Race Location
Your Next Start Line
What Are You
Waiting For?
Every finish line starts with a single decision. Claim your spot at All-Out Fall Fest, put it on the calendar, and turn “someday” into a start date.
103
Days to train
- Race
- All-Out Fall Fest
- Date
- September 19, 2026
Coming Up
More Running races near Westminster, CO
All-Out Dog Days
Less than a mile away
Pioneer Prairie Dog Half, 10k & 5k
10K · 5K
Less than a mile away
Big Waves Family 5K run/walk Presented by Brumate
5K
Less than a mile away
Westy Half & 5k
5K
Less than a mile away
From Endurance Grid
About This Sport
Endurance Grid is here to help you understand the sport, decide if it's the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer's event page.
With running, there's a distance for every fitness level, a community at every start line, and nothing beats the feeling of crossing a finish line you trained for.
Running is an endurance sport that rewards consistency, and showing up every week compounds in ways that will surprise you.
Running
From 5K to marathon, running races are the most accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Frequently Asked Questions (FAQs)
- What is the All-Out Fall Fest?
- All-Out Fall Fest is a running race held in Westminster, Colorado on September 19, 2026. It is one of the many endurance events listed on Endurance Grid, a multi-sport endurance event calendar covering running races, triathlons, HYROX, and more endurance sports across the United States. Find more running races near you or explore our sports guides to learn what race day actually feels like.
- When and where is the All-Out Fall Fest?
- Saturday, September 19, 2026 in Westminster, Colorado at 10170 Church Ranch Way, Westminster, CO. Check the event page for exact start times and wave schedules.
- How do I register for the All-Out Fall Fest?
- Registration is handled through the event's registration page. Confirm pricing and distances there, and sign up.
All-Out Fall Fest
Sep 19, 2026