Water Activities

​​​​​​Lathrop’s two lakes offer something for every water recreationist, from the power boater and canoeist to the sailor, swimmer, and angler. Because of Lathrop’s location in southern Colorado between the foothills and plains, the lakes’ water is often warmer than most mountain lakes and reservoirs at higher elevations. The lakes’ water temperature averages 75 degrees Fahrenheit in the summer. Boat, OHV, and snowmobile registrations are available at the Lathrop Visitor Center.

Important: All watercraft must be inspected for Aquatic Nuisance Species (ANS) before launching. Inspections are available daily from 6 a.m. to 9 p.m. at the park entrance.

(Updated: 6/4/2025 2:30 PM MT)

Martin Lake

Martin Lake, an 180 surface-acre lake, offers a swim beach, water-skiing, fishing, power and sail boating, and windsurfing. Swimming is permitted only in the designated swim beach area and is done so at the individual’s own risk. The swim beach is open from Memorial Day weekend through Labor Day and has covered picnic tables and grills. Pets, fishing, and glass are not permitted at the swim beach area. Children 12 and under must be supervised by an adult.

Ski Beach

Martin Lake has a buoyed area near the boat ramp where boats towing skiers and water toys may safely take off and return to shore. The ski beach shoreline is a grassy area with 4 covered picnic tables and standup grills. Pets, glass, and fishing are prohibited in this area.

Horseshoe Lake

Horseshoe Lake, a 150 surface-acre lake, offers sailing, boating at wakeless speeds, windsurfing, as well as fishing. The smaller, wakeless lake makes it a perfect haven for kayakers and canoeists. Horseshoe Lake is closed to boating November 1 through the end of waterfowl hunting season.