: Yellowstone Park: The brown trout run is on- going in good numbers in the Lewis River channel, but the snow is deep! Cross country skis or snow shoes may help, but the park discourages going there under present weather conditions. Fishing the brown-rainbow run in the Madison River is different with crowds and passable roads to a point. For certain, the Firehole River features very good fishing but the problem is getting there. The brown trout run up the Gardner River should come on soon, but so will the crowds.