30Nov
ALPHA 5K CHALLENGE: Early Bird Registration MAY-NOV 2026
Running
- Distance
- 5K
- Start time
- 09:30
- Entry fee
- $0.00 - $314.90
ALPHA 5K CHALLENGE: Early Bird Registration MAY-NOV 2026
Boulder,
Colorado,
United States
32 days left
www.eventbrite.com
ALPHA 5K CHALLENGE: Early Bird Registration MAY-NOV 2026
About the event
Early Bird Registration Portal for May, 2026 through Nov 30, 2026. Register now! Actual Event Date: June 12, 2027.
Races offered
Weather history
3-year monthly averages for November in Boulder.
Temperature10.6° / 25.4°
Feels like8.0° / 22.2°
Sunshine hours11h 15m
Rainfall1.2 mm
Snowfall—
Wind7.4 km/h (Light breeze)
Humidity44.1%
Max UV indexModerate (5.0)
Sweat lossModerate
Course conditionsFirm and slightly soft
Sunrise06:42
Sunset19:07
About Boulder
Learn more about the host city, Boulder.
Boulder is a home rule city that is the county seat of, and the most populous municipality in, Boulder County, Colorado, United States. With a population of 108,250 at the 2020 census, it is the 12th-most populous city in Colorado. Boulder is the primary city of the Boulder, CO Metropolitan Statistical Area, which had 330,758 residents in 2020, and is part of the Front Range Urban Corridor.
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