The Yellowstone is running low and clear right now and it appears to be recovering well from the spring flooding. Terrestrials and droppers should get the job done right now, so bust out the foam and beaded nymphs. If you like Whitefish a bright shiny nymph should make you happy. Streamers on the lower stretches of the river way can be fun on the right day. If you plan to fish the Yellowstone, be sure to check FWP's Restrictions and Closures page for up-to-date information regarding closures.
Dry Fly
Missing Link Caddis (14-18), Corn Fed Caddis (14-18), Peacock Caddis (14-16), Parawulf Dennis BWO (16-20), Thorax BWO (18-20), Parachute Adams (14-20), Purple Haze (16-20), Film Critic BWO (16-20), Smoke Jumper (16-20), Extended Body BWO (16-20), Griffith’s Gnat (16-20), UV Sparkle Midge (18-20), Chubby Chernobyl Olive/Royal/Purple (8-12)
Streamer
Woolly Bugger (4-12), Articulated Goldie (6), Mini Dungeon, Complex Twist Bugger (2), Kreelex Minnow (4), Sparkle Minnow (4-8), Double Gonga, Urchin Bugger (4), El Sculpito (2), Sculpzilla (4-8), Sculpinator (4-6)
Nymph
Pat’s Rubber Legs (6-12), Zirdle Bug (6-12), Woolly Bugger (4-12), Perdigon (14-18), Pheasant Tail (14-20), Jigster Baetis (14-18), Prince Nymph (10-18), BH Hare's Ear (12-18), Sisslin' Hot Spot Squirrel (14-16), Zebra Midge (16-22), San Juan Worm, Matt’s Shagadelic Mop, Hare's Ear (14-18), Dirty Bird (12-16)