Lamar River

Another jewel in the park's angling crown, the Lamar is renowned for its stunning scenery, diverse fishing opportunities, and healthy populations of native Yellowstone Cutthroat Trout. Located in the northeastern section of the park, flowing through the vast Lamar Valley, it offers a different character compared to the meadow stretches of Slough Creek. The Lamar is a larger, more powerful river with faster currents, deeper runs, and rocky sections, particularly as you move upstream. 

The Lamar River flows alongside the Northeast Entrance Road for a significant stretch, making it relatively accessible at numerous points. There are several pull-offs and informal trails that lead down to the river. Hiking upstream or downstream from these access points can lead to more secluded fishing. The confluence of the Lamar and Slough Creek is a particularly popular area. 

In summary, fishing the Lamar River in Yellowstone Park provides an exciting opportunity to target native Yellowstone Cutthroat Trout in a larger, more dynamic river system compared to the gentler flows of Slough Creek. The accessibility along the road, combined with the stunning Lamar Valley scenery and the potential for excellent dry fly, nymph, and streamer fishing, makes it a must-fish destination for many anglers visiting Yellowstone. Just remember to be prepared for potentially challenging wading conditions and to be aware of the abundant wildlife in the area.