- Rio Alumine begins at Lago Alumine and runs for more than 80 miles before turning into the Collon Cura. Streamer fishing can be a good choice early in the season with high water, but later in the season, dry fly fishing can be very productive. The inch worms falling from the willows become an important meal for the hungry trout, making it the perfect time to find rainbows and big browns cruising under the willows tight to the banks.