Boulder Rez Half
Race Date
Apr 11, 2026
Location
Boulder, CO
Course Info
USATF CertifiedCourse Type
Loop Course
Terrain
road
Difficulty
Rolling Hills
Elevation Gain
0'
Net Drop/km
0 m (Flat)
Separation
0.0%
Also Offers
USATF Certified Course
CO25001MWC · Boulder Reservoir Half Marathon
Relatively flat with minimal net elevation change. Loop course — start and finish are close together.
Quality Score
Standout6310 years running
~282 finishers a year
growing or steady
6% returning runners
USATF certified
runners from 4 states
winner 1:28:06
typical high 61°F
Race Day Weather
5-year historical avgStart (Low)
33°
Afternoon (High)
61°
Pleasant conditions — light layers at start, comfortable by finish
0.0"
Precipitation
11 mph
Wind
46%
Humidity
Historical Finish Times
How 1,702 finishers actually crossed the line across 10 years.
Most recent
2025
Total finishers
1,702
Median time
2:13:03
Latest turnout
299
States
4
Turnout by year
2017–2025
Hover the histogram to inspect specific finish times.
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