Nunn gravel loop

The Nunn gravel loop is predominantly unpaved, with approximately 99% of the route consisting of Weld County gravel roads. This challenging surface is best suited for gravel-specific bikes with wider tires, offering a true gravel grinding experience.

You can expect expansive views of vast prairies and agricultural lands, as the route takes you through and around the Pawnee National Grasslands. It offers open, rural vistas characteristic of Weld County.

Rated as difficult, this route presents a significant challenge, especially due to its 99% unpaved gravel surface. While the elevation gain is moderate, the gravel terrain requires a gravel bike and contributes to a moderate to challenging difficulty level for properly equipped riders.

Yes, the route passes through or near several points of interest. You'll encounter the town of Nunn, and sections of County Road 96 (gravel) and County Road 49 (gravel). While not directly on the loop, nearby Fort Collins offers attractions like Old Town Square and New Belgium Brewing Company.

The best time to cycle this loop is typically during the spring and fall months when temperatures are milder. Summer can be very hot and exposed, while winter can bring snow and icy conditions, making the gravel roads more challenging or impassable.

No, given its difficult rating and 99% unpaved gravel surface, this route is not recommended for beginners. It requires experience with gravel cycling and a suitable gravel bike.

The Nunn gravel loop is well-known as the course for the "Weld County Grinder" event, which typically starts in Nunn. Parking can generally be found within the town of Nunn, which serves as a convenient starting point for the loop.

No, you do not need a permit or have to pay any entrance fees to cycle on the public Weld County gravel roads that make up this loop.

While the route uses public gravel roads, it traverses open agricultural lands and areas near the Pawnee National Grasslands. It's best to check local regulations for specific leash laws and ensure your dog is accustomed to long distances on gravel and potential encounters with wildlife or livestock. Water sources are scarce.

A gravel-specific bike with wider tires (e.g., 38mm or wider) is highly recommended for this route. The extensive unpaved gravel sections make it unsuitable for traditional road bikes with narrow tires.

The route is largely remote, passing through small towns like Nunn. It's advisable to carry all necessary food and water for the duration of your ride, as options for refueling directly on the loop are very limited. Check for local establishments in Nunn before or after your ride.