All-Out Fall Fest
All-Out Fall Fest offers a scenic loop through Colorado's parks with views of Standley Lake and the Flatirons.
Race Date
Sep 19, 2026
Location
Westminster, CO
Quick facts
- Date
- Saturday, September 19, 2026
- Location
- Westminster, Colorado
- Distance
- Half marathon (13.1 mi) + 10K, 5K, 13.1 Miles
- Course
- Loop Course
- Terrain
- Trail
- USATF certified
- Not listed
- Finishers on record
- 309
Highlights
Good For
Atmosphere
Course
The Experience
The All-Out Fall Fest, now in its 9th year, invites runners to explore the natural beauty of Westminster, Colorado. This beloved event takes participants along the Big Dry Creek Trail, offering stunning vistas of Standley Lake with the majestic Flatirons forming a dramatic backdrop.
The course is a loop designed to showcase the park's scenery, providing a relatively flat and fast experience. With an average of around 95 finishers, the race maintains an intimate feel, drawing participants from approximately six states. This event is a testament to the appeal of its location, blending accessible trail running with iconic Colorado landscapes.
Race-provided description
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.
Logistics
Race Day
Saturday, September 19, 2026
Start Time
7:00 AM
Giveaway
Water bottle
Start Location
10170 Church Ranch Way, Westminster, CO, 80021
Course Info
Course Type
Loop Course
Terrain
trail
Scenery
Lake River, Park
Surface
Dirt Trail
Difficulty
Ultra-Flat
Net Drop/km
0 m (Flat)
Separation
0.0%
Also Offers
Course Map
Quality Score
Solid Pick433 years running
~95 finishers a year
growing or steady
6% returning runners
3 timing sources · 3 photos
runners from 6 states
winner 1:21:49
typical high 79°F
Race Day Weather
5-year historical avgStart (Low)
50°
Afternoon (High)
79°
Warm — hydration strategy is key, start conservatively
0.1"
Precipitation
11 mph
Wind
47%
Humidity
Historical Finish Times
How 309 finishers actually crossed the line across 3 years.
Most recent
2025
Total finishers
309
Median time
2:13:02
Latest turnout
95
States
22
Turnout by year
2023–2025
Hover the histogram to inspect specific finish times.
Race Photos
Frequently asked
When is the All-Out Fall Fest?
The All-Out Fall Fest is held on Saturday, September 19, 2026, starting at 7:00 AM.
Where does the All-Out Fall Fest take place?
It takes place in Westminster, Colorado.
What distances does the All-Out Fall Fest offer?
The half marathon (13.1 miles), plus 10K, 5K, 13.1 Miles.
Is the All-Out Fall Fest course flat and good for a PR?
The All-Out Fall Fest is a ultra-flat, loop course course.
How many people run the All-Out Fall Fest?
HalfRuns has finish records for 309 runners who have completed the All-Out Fall Fest.
HalfRuns editorial — independent, no paid placement.
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