All-Out Spring Fever
Race Date
Mar 21, 2027
Location
Golden, CO
The Experience
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!
Logistics
Race Day
Sunday, March 21, 2027
Start Time
9:00 AM
Giveaway
T-Shirt
Start Location
19500 W 64th Pkwy, Golden, CO, 80403
Course Info
Course Type
Loop Course
Terrain
road
Difficulty
Ultra-Flat
Elevation Gain
0'
Net Drop/km
0 m (Flat)
Separation
0.0%
Also Offers
Course Map
Quality Score
Standout6613 years running
~337 finishers a year
growing or steady
4% returning runners
2 timing sources · 4 photos
runners from 19 states
winner 1:19:37
typical high 50°F
Race Day Weather
5-year historical avgStart (Low)
24°
Afternoon (High)
50°
Cool conditions — dress in layers, perfect for fast times
0.1"
Precipitation
11 mph
Wind
55%
Humidity
Historical Finish Times
How 2,157 finishers actually crossed the line across 13 years.
Most recent
2026
Total finishers
2,157
Median time
2:08:40
Latest turnout
179
States
34
Turnout by year
2018–2026
Hover the histogram to inspect specific finish times.
Race Photos
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