All-Out Spring Fever

MAR
21
2027
A spring running event in Golden Colorado offering 5K, 10K and a half marathon along Ralston Creek Trail and Blunn Reservoir. Virtual entries receive mailed swag and medal with series award eligibility.
Sun 21 Mar 2027
13 miles 10 kilometers 5 kilometers

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All-Out Spring Fever

All-Out Multicourse hosts the 15th Annual Spring Fever in Golden, Colorado at 19500 W 64th Pkwy. The event is set against the backdrop of Table Mountain and the Colorado foothills and follows trails along Blunn Reservoir and Ralston Creek.

Distances included:

  • Half marathon (13.1 miles) starts at the NAAC parking lot
  • 10K starts at the NAAC parking lot
  • 5K starts at the NAAC parking lot
  • Virtual options available for each distance

Course details for the in-person events describe start and routing information. The half marathon begins at the NAAC parking lot, proceeds east along the W 64th Parkway sidewalk, then north onto the path alongside Virgil Way, continues east onto the Ralston Creek Trail for a seven mile out and back section, and returns via a counter clockwise loop around Blunn Reservoir. The half marathon route includes eight aid stations and three toilets.

The 10K leaves the NAAC parking lot, follows the sidewalk on the south side of W 64th Parkway, then north on the Virgil Way path before a counter clockwise loop around Blunn Reservoir. That route includes three aid stations and one toilet.

The 5K follows the sidewalk to the first underpass and the Ralston Creek Trail, runs northwest with Blunn Reservoir on the right, turns around at 1.55 miles and returns on an out and back course with two fueling opportunities.

Virtual entries receive event swag including a distance medal shipped the week after the event, retain eligibility for series finisher awards and alumni brag tags, and receive distance and modified placement credit toward the Run Amok Championship. The event benefits the People and Pollinators Action Network and is accessible from nearby highways. Visit the organization's website for the most recent information.

13 mi
Half Marathon
10 km
10k
5 km
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