Hygiene, Niwot Road, and Lyons loop — Gravel

The loop features diverse terrain, with approximately 69% paved surfaces and 31% unpaved gravel sections. You'll experience picturesque plains, rolling hills, and tranquil farm roads, offering a varied gravel cycling experience.

Yes, there are several notable stops. The Mountain Fountain in Hygiene is a recommended cafe and gift store, and the Hygiene General Store is a popular mid-ride stop. You'll also pass by McIntosh Lake and the Sunflower Silo, and ride on scenic sections like N. 49th/51st Street (Gravel) and N. 19th Street (Gravel between Niwot and Oxford).

The Boulder County area generally offers good cycling conditions from spring through fall. For gravel riding, consider the shoulder seasons (spring and fall) for pleasant temperatures and fewer crowds. Summer can be warm, so plan for early morning rides.

Yes, the route incorporates sections of several local trails. You'll ride along parts of the Boulder Valley Ranch, Boulder Valley Ranch Trails, Oligarchy Ditch Trail, Airport Road, Boulder Feeder Canal, Left Hand Trail, Mountain Ridge Place, Agricultural Heritage Museum Trail, and North 39th Street.

Cyclists on this loop are treated to amazing views of the foothills and the Continental Divide, including prominent peaks like Mount Meeker and Long's Peak. The route also offers vistas of high rolling plains, outwash mesas, and lush valleys.

Rated as 'moderate' for road cycling, this loop requires a good level of fitness due to its length (approximately 57.7 km or 35.9 miles) and elevation gain (around 367.5 meters or 1,214 feet). While not overly technical, the unpaved gravel sections and distance might be challenging for absolute beginners.

While the route is a loop, popular starting points often include areas in Longmont, Hygiene, or Lyons. Specific trailhead parking isn't detailed, but you can usually find public parking in these towns. Consider starting near a highlight like the Mountain Fountain in Hygiene for convenient access and a mid-ride stop.

This route primarily uses roads and designated cycle ways. While dogs are generally allowed on leash in Boulder Open Space and Mountain Parks, specific regulations can vary by section. Always check local signage and ensure your dog is leashed and you clean up after them.

No specific permits or entrance fees are required to cycle this loop. The route largely follows public roads and trails within Boulder County. However, always respect private property and adhere to any posted regulations, especially when passing through areas managed by Boulder Open Space and Mountain Parks.

When cycling through sections managed by Boulder Open Space and Mountain Parks, remember to stay on designated trails, yield to hikers and equestrians, and control your speed. Dogs must be on leash, and packing out all trash is mandatory. Always check the official bouldercounty.gov website for the most current regulations.

The estimated duration for completing the 57.7 km (35.9 miles) loop is approximately 3 hours and 12 minutes, depending on your pace and how many stops you make at places like the Hygiene General Store or The Mountain Fountain.