The Malleo is a well-known river because of its demanding fishing situations. It’s considered a technical river with a lot of match the hatch situations.

It starts from Lago Tromen, flowing first like a slow-moving river with a meadow area, meandering back and forth creating grass banks and undercut coves.
It then transforms into a mountain freestone, with dropping riffles and deeper pools before it goes into a canyon and a freestone again until it merges with the Aluminé.

Wading is very easy in the meadow and upper area; it starts getting more challenging and difficult in some spots as It flows down.

The fish are almost equal browns and rainbows with the occasional brook trout.