This moderate 7.9-mile loop descends into lush tunnels of rhododendron, then rises to lofty views of endless forest in Fort Mountain State Park.

Hike, bike, or snowshoe this 3.1-mile loop to pioneer ruins and a relaxing waterfall in Patapsco State Park, a short drive from downtown.

This beautiful 4.3-mile loop adjacent to the Illinois River adds welcome relief--waterfalls, sculpted sandstone canyons, and impressive overlooks--to the usually pancake-flat landscape.

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

Ascend North America's tallest dunes for a day surrounded by alpine peaks, a desert valley, and shifting mountains of sand on this 6.6-mile loop in America's newest national park.

This 5-mile loop undulates through glacially tilled terrain under a hardwood canopy of magnificent fall colors in Kettle Moraine State Forest.

Only 8 miles from downtown, this diverse 3.4-mile loop curves gently around a pair of crystal-clear lakes (bring binocs to watch waterfowl) to an old trading post.

Named after a Forest Service employee who disappeared while hiking in the late 1990s, this 6.5-mile loop links rugged high desert terrain with deep, cool forest.

Moose tracks outnumber boot tracks on this secluded 8.4-mile loop through rolling farmland to a wooded New England pond.

This 5-mile loop wanders through huge redwood stands along the western slope of the Santa Cruz Mountains. Extend the trip with an overnight at a Sierra Club hut.