100K Gravel Bike Rally

Party Pace , 4 timed segments, 100% fun.

Ride at a chill pace with your crew, then give it your all on the timed segments. Each segment will test a different skill (descending, technical trail, climbing, and ‘blind riding’). Your combined times on the segments will determine your results.

Prizes for top finishers in each segment and overall!

REGISTER

THIS is why Boulder is known as one of the country’s best GRAVEL destinations. (Note - there is a 12 pm time cut off at the entrance to Rowena mile 24.)

  • Lefthand Canyon

    Lefthand has the perfect 2-4% grade and follows the creek the whole time, providing amazing scenery to keep you cruising.

  • Rowena

    This historic gold mining road is a fun and adventurous connection between Lefthand and Sunshine Canyon.

  • Speedy Gravel Roads

    When you’re out of the mountains, you’ll be flying back to Lyons on Boulder County’s fast and flat gravel!