Sixteen miles south of downtown Denver on U.S. 85 in Littleton, this park occupies 5,600 acres of prairie against a backdrop of the Rocky Mountains. Chatfield Reservoir, with a 26-mile shoreline, invites swimming, boating, fishing, and other watersports. The area also has 12 miles of paved bicycle trails, plus hiking and horseback-riding paths. In winter, there’s ice fishing and cross-country skiing. The park also has a hot-air-balloon launchpad, a radio-controlled model aircraft field, an off-leash dog area, and a 21-acre man-made wetlands area. Campsites are also available. Admission is $8 per vehicle; the camping fee is $20 to $26 nightly. The entrance is 1 mile south of C-470 on Wadsworth Boulevard