Lago Jeinimeni National Reserve, National reserve in General Carrera Province, Chile.

Lago Jeinimeni National Reserve is a protected area spanning diverse terrain across General Carrera Province. The landscape features high mountains, lenga forests, and open valleys shaped by a cold mountain climate and glacial processes.

Chile's government established this as a national reserve in 1967 to protect the area's natural resources and ecological systems. This designation was part of a broader effort to safeguard Patagonia's wilderness from development.

The reserve took its name from Lake Jeinimeni, whose waters are turquoise. Inside the reserve stood the Piedra Clavada and the Cueva de las Manos, an archaeological site of a nature similar to the Cueva de las Manos in Argentina, where hand prints were left on stone. The reserve received few Chilean and foreign visitors each year.

Visitors reach the reserve via a road about 57 kilometers southwest of Chile Chico by vehicle. Main facilities include camping areas, picnic spots, and marked hiking trails suitable for different fitness levels.

The reserve's subsoil is protected as a scientific site for mining purposes under Decree 219 of 18 May 1998, which fixed its polygon. Any mining work there requires written permission from the President of the Republic, countersigned by the Minister of Mining.