From what I hear, the Yellowstone river and the Gallatin have been pretty crowded. This is probably because Yellowstone, while beautiful, also offers up some of the most consistent dry fly fishing in the area. The Golden Stoneflies have been out and terrestrials are out and about. You can also see the usual array of PMDs, Green Drakes, and Caddis. 

The Gallatin River, the Lamar River downstream of Cache Creek to its confluence with the Yellowstone River, Soda Butte Creek, Slough Creek, Yellowstone River from Tower Junction north to the park boundary, Gardner River downstream of Osprey Falls north to the park boundary, and Snake River from Forest Creek south to the park boundary are all currently under Hoot Owl Restrictions.

Flies to use:

• Mike Lawson’s Henry’s Fork Golden Stone
• Barrett’s Golden Stone
• Mongo Hopper
• Tungsten Zebra Nymph
• Pat’s Rubber Legs
• Parachute Adams
• EZ Caddis
• Hi-Vis Foam Beetle
• Sweetgrass Hopper