Race Discovery
All-Out Fall Fest
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All-Out Fall Fest

Westminster, Colorado, United States View on map
Sep 18, 2027 (America/Denver local time)
Running

About this race

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.

Pick your distance

Running

Half Marathon

Sep 18, 2027 Half-Marathon 8:00 AM
$65.00
Open

10K

Sep 18, 2027 10K 8:30 AM
$45.00
Open

5K

Sep 18, 2027 5K 8:40 AM
$35.00
Open

VIRTUAL Half Marathon

Participate virtually! Get all of the swag, including a distance medal, shipped to you the week after the event, maintain eligibility for series finisher award and alumni brag tags, and get modified placement and distance credit towards the Run Amok Championship!

Sep 18, 2027 Half-Marathon 8:00 AM
$35.00
Open

VIRTUAL 10K

Participate virtually! Get all of the swag, including a distance medal, shipped to you the week after the event, maintain eligibility for series finisher award and alumni brag tags, and get modified placement and distance credit towards the Run Amok Championship!

Sep 18, 2027 10K 8:00 AM
$25.00
Open

VIRTUAL 5K

Participate virtually! Get all of the swag, including a distance medal, shipped to you the week after the event, maintain eligibility for series finisher award and alumni brag tags, and get modified placement and distance credit towards the Run Amok Championship!

Sep 18, 2027 5K 8:00 AM
$20.00
Open

Typical race-day weather

Based on 14 years of Open-Meteo archive data for this event's race dates in Westminster, plus the 3 days either side.

Temp (°C)
Minimum temperature (race-week average) 11.2° / Maximum temperature (race-week average) 27.0°
Feels Like (°C)
Minimum feels like — heat index / wind chill (race-week average) 10.5° / Maximum feels like — heat index / wind chill (race-week average) 27.1°
Peak wind (km/h)
Strongest wind of the day (race-week average)
17.3
Precip (mm)
Precipitation over the day (race-week average)
0.6mm
Humidity
Mean relative humidity (race-week average)
44.6%
Sunrise
Sunrise at the start line on September 18, 2027 (MDT)
Sunset
Sunset at the start line on September 18, 2027 (MDT)
Daylight
Hours between sunrise and sunset on race day
12h 20m

The sun rises at 6:44 AM and sets at 7:04 PM local time (MDT) in Westminster on September 18, 2027 — 12h 20m of daylight.

Course

No course map published yet.

The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.

Reviews

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Results — All-Out Fall Fest

2026 edition View Results
2025 edition View Results
2024 edition View Results
2023 edition View Results

Other races near Westminster

Different organizers, within 40 miles, in the next three months

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Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.

  • Entries, prices, waves and inclusions — the event's official registration page
  • Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
  • Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
  • Comparisons and counts — Race Discovery calendar, 14 Westminster events

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