Lago Lolog is a glacial lake situated in the department of Neuquén, Argentina, at coordinates 40°01′52″S 71°25′23″W, at a surface elevation of 899 meters above sea level. The lake reaches a maximum depth of 200 meters, giving it the deep, cold character typical of Patagonian glacial lakes. It lies in close proximity to both Junín de los Andes and San Martín de los Andes, and two roads connect it to those nearby cities, providing reasonable overland access for paddlers transporting watercraft.

The lake is well regarded as a fishing destination, with rainbow trout and brown trout being the primary species present. Boat-based excursions on Lago Lolog are offered commercially out of San Martín de los Andes, with private tours available during the summer season. These tours operate on vessels certified by the Argentine Coast Guard (PNA) and equipped with safety and VHF communication devices, indicating that navigation on the lake is subject to Argentine maritime authority oversight. Paddlers should be aware of this regulatory context when planning independent trips.

The surrounding landscape is consistent with the broader Patagonian lake district, and the lake shares the region with other notable water bodies including Lago Lácar. Commercially operated tours access beaches reachable only by water, which may be of interest to paddlers looking to explore the shoreline. The lake's glacial origin and considerable depth point to cold water temperatures year-round, a factor paddlers should account for when planning safety protocols. Tour operations are available only in the summer season, reflecting the general pattern of the region where austral summer (roughly December through March) is the primary window for water-based activity.