Lago General Pinto Concha is a 475-hectare lake situated at 894 meters elevation within Parque Nacional Hornopirén, in the comuna of Hualaihué, Los Lagos Region. Its coordinates place it at approximately 41°50′S, 72°19′W. The lake sits within the drainage basin of the río Negro (Hornopirén) and drains subterraneously rather than through a surface outlet, an unusual hydrological characteristic. It was absent from older cartographic records, including the 1945 Instituto Geográfico Militar map at 1:500,000 scale, and only appears on more recent mapping.

Access to the lake requires a trek of roughly 9.5 to 13 kilometers one way (figures vary due to GPS differences), with the total round trip covering approximately 19 kilometers. The approach involves approximately 7 kilometers of private land before reaching the park boundary, followed by a further 2.5 kilometers inside Parque Nacional Hornopirén to reach the lake. The trail is characterized by significant mud and exposed roots, making sturdy trekking boots and gaiters strongly advisable. The overall trek is rated high difficulty and typically takes around 10 hours. Visitors are required to register at the CONAF ranger station; no entry fee is charged, though stopping at the registration post is expected. Rangers are present year-round.

The surrounding landscape is dominated by dense Alerce forest, one of the most notable features of the approach route. The lake itself is described as having clear water and lush surrounding forest. Wildlife in the area includes a variety of bird species. The lake is located along the Carretera Austral corridor, accessible from the town of Hornopirén, which has fuel and ATM services. Reaching Hornopirén involves approximately 54 kilometers of gravel road from Puelche, and a ferry crossing (barcaza) from Caleta La Arena is part of the standard approach route from the north.

Given the high-difficulty, multi-hour approach on a muddy trail at nearly 900 meters elevation, any paddling activity at this lake would require carrying equipment the full distance of the trek. No paddling-specific infrastructure, launch points, or regulations are documented for the lake.