In 226 days · Sun, Mar 21, 2027
Don't let race day sneak up
One email during race week. That's it.
When
Sunday, March 21st, 2027
Where
19500 W 64th Pkwy, Golden CO
Distances
Half · 10K · 5K
Typical weather
27–52°F · some rain risk
See last 10 years
On this date: rain 2 of the last 10 years
2026
44–86°F
dry
2025
29–54°F
dry
2024
26–60°F
dry
2023
26–54°F
dry
2022
28–39°F
rain
2021
27–37°F
rain
2020
15–40°F
dry
2019
19–47°F
dry
2018
21–57°F
dry
2017
38–68°F
dry
Best months to race in Colorado →
About this race
Event Overview
- Host: All-Out Multicourse
- Event: 15th Annual Spring Fever
- Date: 2027-03-21
- Location: 19500 W 64th Pkwy, Golden, CO
Course Details
- Distance Options: 5K, 10K, and half marathon
- Scenic Routes: Courses trace the shores of Arvada's Blunn Reservoir
- Trail: Ralston Creek Trail
- Backdrop: Set against Table Mountain and the Colorado foothills
Event Highlights
- Charity Beneficiary: People and Pollinators Action Network
- Fun Elements: Features mascot Buzzby
- Accessibility: Conveniently accessible from nearby highways
- Qualification: Use Spring Fever to qualify for your BOLDERBoulder wave
Registration
- Link: Register Here
- Experience: A rewarding event for both novice and experienced athletes
- Community: Join in the spring celebration
- Environmental Focus: We really love the bees
Course map
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