2025 - All-Out Spring Fever
2025 distances
Running
Half Marathon
Half marathon athletes will depart the east end of the NAAC parking lot then run along the sidewalk on the south side of W 64th Pkwy to reach the 2nd underpass and the path that runs adjacent to the west side of Virgil Wy. Turning right to go east on Ralston Creek Trail, half athletes will complete a 7 mile out & back dogleg before rejoining the counter-clockwise Blunn Reservoir loop. Going under the underpass at the reservoir entrance, athletes will make their way back up onto the 64th sidewalk then return the way they came to the finish line. 8 opportunities to fuel up (+ 3 toilets).
10K
10K athletes will depart the east end of the NAAC parking lot then run along the sidewalk on the south side of W 64th Pkwy to reach the east underpass and the path that runs adjacent to the west side of Virgil Wy. Athletes will continue north until just past Tucker Lake, then west and south, following Ralston Creek Trail around Blunn Reservoir going under the west underpass to return they way they came into NAAC and the finish line. 3 opportunities to fuel up (+1 toilet).
5K
5K athletes will depart the east end of the NAAC parking lot then run the sidewalk on the south side of W 64th Pkwy to reach the underpass and Ralston Creek Trail. Running northwest, with Blunn Reservoir on their right, athletes will turn around and return on this out & back course. 2 opportunities to fuel up.
VIRTUAL Half Marathon
Participate virtually! Get all of the SWAG, including a distance medal, shipped to you the week after the event, maintain eligibility for series finisher award and alumni brag tags, and get distance credit towards the Run Amok Championship!
VIRTUAL 10K
Participate virtually! Get all of the SWAG, including a distance medal, shipped to you the week after the event, maintain eligibility for series finisher award and alumni brag tags, and get distance credit towards the Run Amok Championship!
VIRTUAL 5K
Participate virtually! Get all of the SWAG, including a distance medal, shipped to you the week after the event, maintain eligibility for series finisher award and alumni brag tags, and get distance credit towards the Run Amok Championship!
Race date Weather
Conditions on March 23, 2025 — historical Open-Meteo data.
About Golden
All-Out Spring Fever takes place in Golden, Colorado, United States. The local timezone is America/Denver.
Reviews
Done this event?
If you've participated in this event, share your experience with other runners
🏃 Plan Your Next Race in Golden
Find upcoming events by distance:
- Golden 5K Races Best Golden routes for beginners and speed work.
- 10K Run Events in Golden The most popular local distance in Colorado.
- Golden Half Marathons Top-rated 21.1K courses in the Golden area.
- Golden Running Calendar 2026 See all upcoming race dates.
Race information has been sourced from the event's official website and other publicly available resources. For the most up-to-date details, please refer to the official website directly. If you notice any incorrect or missing information, don't hesitate to reach out to us by email.
