I was fortunate enough to spend 4 months out west this past summer. The last 5 weeks I traveled from ID to OR, CA, AZ and CO.
If I think on it I could probably come up with many- here's three.
1, Green Drakes on Railroad Ranch stretch of the Henry's Fork. Several 20 inchers landed.
2. Fished the Yellowstone River above Emigrant but below Yankee Jim the week it became fishable. In 3-4 hours, I got a Yellowstone Slam- whitefish, cut bow , Yellowstone cutty , brown and rainbow. Cubby with Prince dropper. It's was murder.
3. Caught 20 fish? (I don't know, a lot) at the Ruby. It was sweet because the two prior forays were very poor. They were all big fish. Small PT's on the bottom hovered them up
Don't put off fishing your dreams, life is too short.