The All-Out Spring Fever Half Marathon, 10k, and 5k is a multicourse event entering its 12th year, proudly supporting the National Kidney Foundation. Challenging Course. Running alongside Arvada’s Blunn Reservoir using the Ralston Creek Trail, this half-marathon course is known to be a challenge for both beginners and elite runners alike. Nestled in the foothills of Colorado’s Rocky Mountains, Golden is a scenic region of the state, so expect incredible National Park-like views and common sitings of wildlife throughout.
All-Out Spring Fever Half Marathon, 10K & 5K
Date
Mar 22, 2026
Starting Time
9:00 AM
Course
Trail
Fees
$60+
Location
Golden
Participants
1-100
Terrain
Challenging
Environment
Park Run
Temperature
High: 49°
/ Low: 33°
Overview
Course Description
Leaving from Jefferson County’s NAAC Stadium in Golden, Colorado, this half-marathon course takes runners from the base of Table Mountain through Colorado’s beautiful foothills. Departing east out of the parking lot, all participants will proceed along 64th Parkway before reaching the path adjacent to Virgil Way. Runners will then turn right onto Ralston Creek Trail for a seven-mile out-and-back effort before rejoining the Blunn Reservoir loop. Making their way back to the 64th Parkway, it’s the final leg as they return to Jefferson County’s NAAC Stadium parking lot for the finish. This course has a total of eight (8) fueling stations throughout, so no need to worry about nutritional fatigue! With water, energy drinks, Gatorade, and gels on offer, there’s no need to pack your own fuelling. Finally, all participants will receive a swag bag equipped with a stainless steel water bottle, a brag tag, souvenir race bibs, and a custom sticker. For those who finish, a finisher’s medal can be expected. Oh, and free race-day pictures for all!
Past Results
