Lago Marí Menuco is an artificial lake located in northern Neuquén province, approximately 65–80 kilometers north of Neuquén city. It was created when a diversion dam was built on the Río Neuquén, filling natural basins to form a lacustrine complex together with the adjacent Lago Los Barreales. The Planicie Banderita hydroelectric plant operates on site, utilizing a drop of 69 meters with two generating units. Water flows back into the Río Neuquén channel through the Planicie Banderita dam.

The lake is fed by the Río Neuquén and features clear, cold water. The surrounding landscape contrasts blue water against reddish mountains, with vegetation along the shoreline. Stone beaches characterize parts of the shoreline.

The primary access route from Neuquén city is via Ruta Provincial 7 northbound, passing through Vista Alegre at roughly 20 kilometers, then continuing approximately 45 kilometers further to the lake. Some access roads leading directly to the shoreline are unpaved cobbled tracks known locally as "picadas," and a vehicle with reasonable ground clearance is advisable. There is no direct public transport; private vehicle or arranged transfer is the standard means of reaching the lake.

Paddling activities on the lake include canoeing and kayaking, alongside windsurfing, water skiing, and motorboat use. The presence of motorized watercraft, including speedboats, is a relevant safety consideration for paddlers. Sport fishing for trout, pejerreyes, and perch is also common on the water.

The lake is not officially designated as a supervised bathing area and lacks lifeguard services, provisioning, or formal public facilities at the free-access shoreline points. Some private clubs and campgrounds operate on the lake, including Club Privado Hidronor, and these may have their own entry fees or booking requirements, particularly during peak season. Camping at sites such as Puesto Moreno is available, with advance booking recommended in summer.

Spring and summer are the recommended seasons for water-based activities. Winter road conditions can be more challenging, and the water is cold even in warmer months. The lake is generally accessible year-round, though conditions should be verified before visiting outside of the main summer season.