Also, be sure to check out our Perfect Fly Hatch Charts for streams in Yellowstone Park. . New "Perfect Fly" Website Stream Section - Lewis River We just added a new stream section in our Perfect Fly website for the Lewis River in Yellowstone National Park. You pass alongside and over this river on your way into the park from the South Entrance Gate.
It's off to your right down deep in a canyon when you first start up the mountain just inside the park. At the top of the mountain, you will see it change into a completely different type of stream. There and up to the bridge on the South Entrance Road, the stream is wide and smooth flowing.
The stream above the bridge changes back to fast, pocket water with some cascades before it leaves Lewis Lake. The best part of the stream is probably the Lewis Channel, the section of river between Lewis and Shoshone Lakes. Large brown trout can be caught in this section during the pr-spawn stage.