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Boulder Roubaix Road Race
April 6
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Boulder
First held in 1990, Boulder Roubaix Road Race is the most popular and largest attended one day road race in Colorado. 32 different categories to choose from. From 1st timer to Pros.
An 18.7 miles (30k) loop with 43% paved roads & 57% unpaved roads in North Boulder County.
Some photos from 2019 can be found here:
Event details and registration here