Walker Ranch, situated in the foothills 7.5 miles west of Boulder just off Flagstaff Mtn. Rd., offers a great ride, either as a loop or an out -and-back excursion. The loop around the park is actually a combination of four trails: the South Boulder Creek, Crescent Meadows, Eldorado Canyon and Columbine Gulch trails. There are some serious climbs and descents, with a few formidable rocky sections, too. The loop covers 7.4 miles and features a carry-your-bike-on-your-shoulder scramble into the canyon of South Boulder Creek -- a favorite lunch spot. The loop can be ridden in either direction, but most favor going counter clockwise from the parking lot. Either way, there is an elevation gain of 1740 feet. A more interesting and somewhat longer ride can be had by riding from the trailhead to South Boulder Creek, then retracing your route. This trail is both physically and technically challenging, and requires good bike handling skills.
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