In 2 days · Sun, Nov 1, 2026
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Sunday, November 1st, 2026
19500 W 64th Pkwy, Golden CO
Half · 10K · 5K
31–55°F · low rain risk
See last 10 years
On this date: rain 0 of the last 10 years
2025
26–63°F
dry
2024
29–57°F
dry
2023
27–52°F
dry
2022
39–66°F
dry
2021
31–43°F
dry
2020
30–60°F
dry
2019
15–29°F
dry
2018
27–45°F
dry
2017
35–67°F
dry
2016
40–66°F
dry
Best months to race in Colorado →
Race-day forecast · Sunday, Nov 1
Cloudy · 51–58°F
Sunday, Nov 1starts near 51°F · 21% chance of rain · wind up to 5 mph
About this race
From the base of Table Mountain and Colorado's spectacular foothills, All-Out Multicourse presents our 15th annual Kooky-Spooky from Jefferson County's NAAC Stadium… easily accessible from several nearby highways. Along with its Endless Series sidekick in March, Spring Fever, these 5K, 10K & Half Marathon courses will hug the shores of Arvada's Blunn Reservoir via the Ralston Creek Trail and will challenge the beginner and veteran athlete alike! Of course, we'll still be celebrating the Halloween spirit so re-use your Halloween costume for our official costume contest. And especially revel in the extra hour of sleep you get as Nov. 1 is the end of daylight savings time!
Course map
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Run clubs near Golden to train with before race day.
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