Course
Starts and finishes at the east end of NAAC Stadium, Golden, with the route following the Ralston Creek Trail past Blunn Reservoir in Arvada. Aid stations average 1.4 miles apart and carry water, electrolytes and energy gels.
Key dates
- !RegistrationOpen now
- ★Race daySun 21 Mar 2027
About
The 14th Annual Spring Fever is a rewarding event for novice and experienced athletes set against Table Mountain and Colorado foothills. It features 5K, 10K, and half marathon courses along Ralston Creek Trail and Blunn Reservoir, benefiting UpRoot Colorado and serving as a BOLDERBoulder qualifier.
Save All-Out Spring Fever to your season and RunCalendar reminds you the morning entries open and before they close. Free on iPhone, no account needed.
-
Spring Equinox Half Marathon & 5K
Half the dirt, half the asphalt, starting at a brewery
-
Cryogenic Cannibal Chase 8k
An 8K loop around frozen Lake Estes
-
RMRR Marathon Training Series
Supported 10 and 20 mile marathon build-up races
-
The City Park Circuit
Loops around Denver's City Park lake and zoo
A confirmed date shows its day; a provisional one shows only its month, because we won't claim a day we don't have. This page is rebuilt every night from the RunCalendar catalogue.