All-Out Spring Fever
Arvada, Colorado, United States
Mar 22, 2026 - Sunday
5k, 10k, Half-marathon
Race Information
All-Out Multisport presents the annual Spring Fever from Jefferson County’s NAAC Stadium. Easily accessible from Hwy 93, 6th Ave, Hwy 58 or I-70, these 5K, 10K & Half Marathon run courses will hug the shores of Arvada's Blunn Reservoir via the Ralston Creek Trail and will challenge the beginner and veteran athlete alike.
Related Events
All-Out Mardi Crawl
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Size: 100 - 500 participants
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All-Out Spring Fever
Date: Mar 22, 2026 - Sunday
Size: 500 - 1,000 participants
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All-Out Summer Breeze
Date: Jun, 2026 (TBD)
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All-Out Beat the Heat
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Date: Jul, 2026 (TBD)
Size: 100 - 500 participants
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All-Out Runapalooza
Date: Aug, 2026 (TBD)
Size: 100 - 500 participants
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All-Out Fallfest
Date: Sep, 2026 (TBD)
Size: 100 - 500 participants
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All-Out Kooky-Spooky
Date: Nov, 2026 (TBD)
Size: 500 - 1,000 participants
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All-Out Fa La La
Date: Dec, 2026 (TBD)
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All-Out Polar Prowl
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Race Facts
Race Size: 500 - 1,000
Elevation: Some Hills
Course Type: Trail
Boston Qualifier: No
Kids Run: Yes
Where to Stay
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