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> Caldera loop
This scenic and low-traffic route explores ranch country and open space between Niwot and CO 36, contouring around the eastern and southern edges of the caldera hills south of Lyons. There's a gravel stretch of about 3 miles in the middle that's fine for road bikes. Great views and good variety of flat and rolling terrain. No big climbs. You could keep a fast pace on this one.
The USGS topographic map below is custom-centered on Caldera loop. Customize a map online, and we'll print and ship you a
large-format waterproof map. Custom prints start at only $9.95 for an 18" x 24" field map, but you can build huge 5' x 8' wall posters too!