Sunflower Silo

The Boulder Roubaix Course — Gravel presents a moderate road cycling challenge, spanning 21.0 miles (33.7 km) with 757 feet (231 metres) of elevation gain. You can expect to complete this route in about 2 hours and 31 minutes. As you ride, you will encounter a diverse landscape of rolling hills, offering views of the foothills and snow-capped mountains to the west, alongside rural farms. Keep an eye out for the Sunflower Silo, a distinct landmark near the town of Hygiene, adding character to the scenery.

Planning your ride on this course requires some preparation. Given the varied gravel conditions, it is highly recommended that you use wider tires for better traction and perform a thorough bolt check on your bike before heading out. This is a popular race course, so if you plan to ride during an event, be sure to check local calendars to avoid conflicts. There are no specific permits or fees mentioned for general use.

This route is notable for its significant gravel sections and unique blend of paved and unpaved surfaces, making it a demanding yet rewarding experience. Located within the Lagerman Agricultural Preserve, it is known as a popular race course that truly tests your riding skills. The mix of smooth and challenging gravel, including some washboard or ruts, sets this course apart in the region.

This moderate 35.9-mile gravel cycling loop near Longmont offers scenic views of the Continental Divide and charming rural stops.