3. Boulder Reservoir
The 700-acre Boulder Reservoir, located about 5 miles northeast of downtown Boulder, provides not only drinking water for the area but also loads of recreation opportunities for travelers and locals alike. Throughout the warmer months, you’ll spot all sorts of different watercraft on the lake: windsurfers, power boats, pontoons, stand-up paddleboards, kayaks, sailboats and rowboats. Rentals are available from Rocky Mountain Paddleboard, but to bring your own watercraft you’ll need to secure a boat permit in advance. Swimming is permitted in a designated area of Boulder Reservoir with lifeguards on duty. Moderately priced hotels abound around Boulder, home to the University of Colorado Boulder. If you’re interested in an upscale getaway, check out the spacious guest rooms at St Julien Hotel & Spa.
4. Cherry Creek Reservoir
Cherry Creek Reservoir is situated in Cherry Creek State Park, less than 15 miles southeast of downtown Denver. Boating is a popular activity on the 880-acre reservoir from April to November as long as you follow Colorado boating regulations. Also in the summer visitors can swim in a designated, roped-off area, but note lifeguards are not on duty here (nor on any Colorado state park beaches). Hiking, birding and biking are other popular outdoor activities, and this unique state park has a model airplane area called Sudhakar Field, where enthusiasts (even beginners) gather to fly their planes. The Cherry Creek Campground has full hookups for RVs and basic tent sites you can reserve year-round. Otherwise, moderately priced hotels can be found in Aurora, such as the DoubleTree by Hilton Denver – Aurora.