In 331 days · Sat, Sep 18, 2027
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Saturday, September 18th, 2027
10200 West 100th Avenue, Westminster CO
Half · 10K · 5K
51–79°F · low rain risk
See last 10 years
On this date: rain 0 of the last 10 years
2025
46–79°F
dry
2024
49–85°F
dry
2023
53–77°F
dry
2022
53–88°F
dry
2021
59–88°F
dry
2020
55–86°F
dry
2019
53–85°F
dry
2018
57–86°F
dry
2017
52–85°F
dry
2016
51–85°F
dry
Best months to race in Colorado →
Race-day forecast · Saturday, Sep 18
Rain likely · 53–77°F
Saturday, Sep 18starts near 53°F · 53% chance of rain · wind up to 23 mph
About this race
Get ready to totally rock the new courses coming to Fall Fest 2027! It's like trail running that's absolutely rad—with all the support, reliability, and killer experience you've come to expect from All-Out. These new courses are going to be awesome! Every distance will get to experience the wonderful Standley Lake Open Space and those tubular views of the Flatirons over Standley Lake. We're totally stoked to finalize the details with the venue, and we'll share the new course and venue by mid-January 2027. This is going to be gnarly!
Course map
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Run clubs near Westminster to train with before race day.
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