Lago Rosselot sits within the Lago Rosselot National Reserve in the Aysén del General Carlos Ibáñez del Campo Region, positioned immediately north of Queulat National Park and east of the Carretera Austral. The reserve, designated in 1983 and administered by the Corporación Nacional Forestal (CONAF), covers 127.25 km² and is centered at approximately 44°4′S, 72°22′W. The lake receives inflow from the Río Figueroa, which originates at Lago Verde and travels roughly 60 km before emptying into Lago Rosselot.

Kayaking is an established activity on the lake, with at least one commercial operator running guided trips out of La Junta, the nearest town. These guided excursions include equipment preparation, a safety briefing, paddling to a beach, and an approach to a waterfall referred to locally as a cascada escondida. The town of La Junta, located in the Cisnes commune, serves as the primary base for accessing the lake.

The reserve's mandate includes fishing and water-based activities, indicating that paddling is a permitted and recognized use of the lake. The surrounding landscape is characteristic of the Valdivian temperate rainforest zone, with dense understories and evergreen canopies typical of this part of Patagonia. Wildlife in the broader Aysén region includes black-necked swans, herons, and Magellan geese, among other bird species.