Every other year, the cycling community turns its attention to Boulder, Colorado, for one of the most exciting and unique races in North America. Named in homage to the legendary Paris-Roubaix, this event offers a distinctly American twist on the classic European challenge, featuring a mixed-surface race that draws competitors from across the country and around the world. Held the day before the original Paris-Roubaix, it’s become a Boulder area fan favorite and a celebration of cycling culture.

The course is a demanding 18.7-mile loop that combines 43% paved and 57% unpaved roads, creating a true test of both skill and endurance. The terrain varies dramatically—from smooth asphalt to deeply rutted dirt tracks—making race conditions highly dependent on weather. Rain transforms the dirt sections into slippery, muddy challenges that separate the prepared from the hopeful.

Pro Men tackle five grueling laps for nearly 96 miles, while Pro Women complete three laps covering approximately 56 miles. Races begin early with beginners and first-timers starting at 8:00 AM, followed by other categories throughout the day.

The rugged nature of the course means neutral support is limited and largely volunteer-dependent. Come prepared with your own repair equipment, including pump and spare tube. A thorough pre-race bike check—bolts, bottle cages, everything—can save your race from mechanical disaster.

For longer races, a feed zone sits strategically just east of 49th on Oxford Road, allowing supporters to help without straying far from the start/finish line. The rolling terrain and variable conditions of North Boulder County create a spring classic atmosphere that tests every cyclist brave enough to face its challenges.