The river is now green and visibility is around two feet. The big stuff underneath such as stoneflies and streamers is still fishing the best. However fish are now starting to look up for hoppers and large attractors.
One of our guides guiding in the park today said that a plug of mud was moving thru the Lamar River from a recent rainstorm, which should hit the upper Yellowstone by tomorrow. Mid Valley down should be safe tomorrow, on Wednesday you may want to go way low or up high to avoid the plug. Haven’t seen a spike on the Lamar yet, so it is likely a smaller plug which will hopefully dissipate with the higher flows of the Yellowstone.
The river is now flowing at 7520 cfs. Nymphing has been better than throwing dries or streamers, but a few clients have committed to the dry fly only and are just now starting to see success. Try a mix of goldenstones, hoppers, trudes, stimulators, and other attractor dries. To hedge your bets, tie on a nymph dropper. Rubberlegs, prince nymphs, PT’s, anatomays, take your pick, they all seem to be working right now. If you do throw streamers plan on dead drifting them and getting deep, or fish with a sinking line. With everyone fishing the edges, the bigger fish are no longer right on the surface.