All-Out Spring Fever

From All-Out Multicourse Productions

Sunday, March 21, 2027

9:00 AM MDT

Golden, Colorado

$27.50–$75.20 · 6 races

5km, 10km, Half Marathon

Event summary

Get ready for the 15th Annual All-Out Spring Fever, hosted by All-Out Multicourse Productions on Sunday, March 21, 2027, in the picturesque town of Golden, Jefferson! This vibrant event is designed for athletes of all levels, from beginners to seasoned pros, and offers a delightful experience set against the stunning backdrop of Table Mountain and the beautiful Colorado foothills. Participants can choose from a variety of race distances, including a scenic 5K, a challenging 10K, and a rewarding half marathon, all of which wind along the breathtaking shores of Arvada's Blunn Reservoir via the Ralston Creek Trail.

Join us for a day filled with fun and excitement, featuring our beloved mascot Buzzby, as we celebrate spring and promote a great cause! All proceeds from the event benefit the People and Pollinators Action Network, highlighting our commitment to environmental sustainability and the well-being of our buzzing friends. Plus, participating in Spring Fever gives you the chance to qualify for your BOLDERBoulder wave! Don’t miss out on this exhilarating event—mark your calendars and be part of the Spring Fever celebration!

Races

Half Marathon

Incl. $5.20 Fee & T-Shirt

The half marathon course begins at the NAAC parking lot, leading athletes east along the W 64th Pkwy sidewalk, then north onto the path alongside Virgil Way. Athletes will then turn right (east) onto the Ralston Creek Trail to complete a 7-mile out-and-back section before joining a challenging counter-clockwise loop around Blunn Reservoir, ultimately returning to the venue. Eight aid stations and three toilets are strategically located along the route to ensure athletes stay fueled and refreshed.

9:00 AM MDT

$75.20

Register
10k

Incl. $4.00 Fee & T-Shirt

10K athletes will start from the NAAC parking lot and head east along the sidewalk on the south side of W 64th Pkwy then north on the path running alongside Virgil Wy to start the challenging counter-clockwise loop around Blunn Reservoir before returning to the venue. There are three aid stations and one toilet along the route to keep athletes fueled and refreshed.

9:30 AM MDT

$54.00

Register
5k

Incl. $3.40 Fee & T-Shirt

5K athletes will start from the NAAC parking lot and head east along the sidewalk on the south side of W 64th Pkwy to the first underpass and Ralston Creek Trail. Running northwest, with Blunn Reservoir on their right, athletes will turn around at 1.55 miles and return on this out & back course. Two opportunities to fuel up.

9:40 AM MDT

$43.40

Register
VIRTUAL Half Marathon
Virtual

Incl. $3.40 Fee & T-Shirt

Participate virtually! Get all of the swag, including a finishers medal, shipped to you the week after the event, maintain eligibility for series finisher award and alumni brag tags, and get modified placement and distance credit towards the Run Amok Championship!

9:00 AM MDT

$43.40

Register
Virtual 10k
Virtual

Incl. $2.80 Fee & T-Shirt

Participate virtually! Get all of the swag, including a finishers medal, shipped to you the week after the event, maintain eligibility for series finisher award and alumni brag tags, and get modified placement and distance credit towards the Run Amok Championship!

9:00 AM MDT

$32.80

Register
Virtual 5k
Virtual

Incl. $2.50 Fee & T-Shirt

Participate virtually! Get all of the swag, including a finishers medal, shipped to you the week after the event, maintain eligibility for series finisher award and alumni brag tags, and get modified placement and distance credit towards the Run Amok Championship!

9:00 AM MDT

$27.50

Register

Organiser's description

All-Out Multicourse is proud to host our 15th Annual Spring Fever, a rewarding event for both novice and experienced athletes set against the backdrop of Table Mountain and the stunning Colorado foothills. This spring celebration, featuring our mascot Buzzby, includes 5K, 10K, and half marathon courses that trace the scenic shores of Arvada's Blunn Reservoir via the Ralston Creek Trail. Conveniently accessible from nearby highways, Spring Fever is the endless series spring counterpart to Kooky-Spooky, and proudly benefits our NEW charity, People and Pollinators Action Network (we really love the bees). And don't miss that you can use Spring Fever to qualify for your BOLDERBoulder wave!