All-Out Spring Fever
- Date Sun 22nd March 2026
- Time 9:00AM MDT
- Location Golden, Colorado
- Price $27.50 - $64.60
- Races 6 races
- Distances Half Marathon, 10km, 5km
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Event summary
Get ready for an exhilarating day of fitness and fun at the 13th annual All-Out Spring Fever event, taking place on Sunday, March 22, 2026, in the beautiful city of Golden, Jefferson. Set against the stunning backdrop of Table Mountain and Colorado's picturesque foothills, this exciting event will feature a range of challenging races, including 5K, 10K, and Half Marathon courses. Participants will enjoy scenic routes that hug the shores of Arvada's Blunn Reservoir via the Ralston Creek Trail, making it the perfect setting for both beginner and veteran athletes to showcase their skills. Don't miss this fantastic opportunity to embrace the spirit of spring and join fellow runners in a celebration of health and community!
Organiser's Description
From the base of Table Mountain and Colorado's spectacular foothills, All-Out Multicourse presents our 13th annual Spring Fever from Jefferson County's NAAC Stadium easily accessible from several nearby highways. Along with its Endless Series [https://www.alloutmultipro.com/endless-series] sidekick in October, Kooky-Spooky [http://kookyspookyrun.com], these 5K, 10K & Half Marathon courses will hug the shores of Arvada's Blunn Reservoir via the Ralston Creek Trail and will challenge the beginner and veteran athlete alike!
Races
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Half Marathon
Incl. $4.60 Fee & T-Shirt
Sun 22nd March 2026 (9:00AM MDT)
$64.60
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
Incl. $3.40 Fee & T-Shirt
Sun 22nd March 2026 (9:30AM MDT)
$43.40
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
Incl. $2.80 Fee & T-Shirt
Sun 22nd March 2026 (9:40AM MDT)
$32.80
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
Incl. $3.40 Fee & T-Shirt
$43.40
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
Incl. $2.80 Fee & T-Shirt
$32.80
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
Incl. $2.50 Fee & T-Shirt
$27.50
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!
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