Southern Chile fly fishing guide Lu Warner, from the Valle Bonito Lodge explains the importance of foam lines to catching big trout in the unique context of Southern Chile's lakes and rivers. Where there are foam lines in Southern Chile there are fish, and sometimes they are the only place both you and the fish can get together in the fast moving rivers of the Patagonia.

December was a wash ( literally ). If there where fish in Patagonia in December, there was no way to get at them as the rivers swelled with heavy rain. Even the best whitewater rafting companies in the World had to hang their paddles and wait out the rain in Patagonia. Magically, around the new year the weather turned hot and sunny and the rivers retreated.