This 4.6-mile out-and-back climbs to a group of backcountry lakes tucked below the Continental Divide.

Hike or ride smooth singletrack on this 7.2-mile lasso-loop, which climbs gently through rich scrubland and ponderosa forest to a killer mountainside overlook.

Cruise 5.2 miles along gentle foothills, Ireland-esque pastures, and past an old sawmill to a vista overlooking Boulder Canyon and the Front Range.

This easy trail passes through rolling grasslands and wetlands to a scenic highpoint overlooking the Front Range. Good for winter rides and cycle-cross training.

Hike lonely trails filled with Yosemite-like granite formations in Lost Creek Wilderness on this 15.4-mile out-and-back up the Retirement Range's highest peak.

This 10-mile loop in Hall Ranch begins with a stiff, sometimes technical, climb then speeds into rolling forestland and endless grassy meadows to an old ranch in the shadow of Longs Peak.

Bag two peaks on this 9-mile, fido-friendly loop around Boulder's signature Flatirons.

Hike into the core of Indian Peaks Wilderness on this 13.6-mile overnight, which leads past waterfalls to a sunbleached valley and a sweet lakeside campsite.

Thanks to only a little elevation gain, this 7-mile loop offers flatlanders great rewards (big views, wildlife, solitude) without much suffering. Pack plenty of water and sunscreen.

Follow this 9.9-mile loop through vibrant wildflower displays and past snow-fed streams to a huge alpine lake with unbeatable campsite views of Mount Meeker.