Fodor's Expert Review Union Reservoir
Longmont
Body of Water
One of only a few natural lakes in Colorado, this 736-acre body of water is known as one of the best windsurfing spots on the Front Range, with easy waterfront access. It's also quickly becoming one of Colorado’s finest walleye fishing spots. Rent paddleboards and kayaks, swim, or watch dogs swim---the reservoir has one of the biggest dog swim beaches in northern Colorado.