The principal lake of Los Alerces National Park, Futalaufquen is deep, glacially cut and startlingly clear, framed by native forest running right down to the water's edge. Brook, brown and rainbow trout all hold here, often deep along the drop-offs where the lake bed falls away sharply from shore, and a Woolly Bugger or Matuka stripped slowly past structure accounts for most of the better fish taken from shore or boat. Wind can build through the day on open water, so mornings tend to fish calmer and more predictably. Access and ecological protections follow the same strict National Park framework as the surrounding rivers, with biosecurity checks in place to guard against didymo. It rewards a slower, more deliberate approach than the technical rivers feeding it — read the structure, work it thoroughly, and let the lake's scale do some of the work.

• Lake
• Glacial