It depends on what time of year you go. Stop in the town of West Yellowstone in Montana on the west side of Yellowstone Park. They have 5 good flyshops and all have info posted that they change frequently to let you know what hatches are going on & what works well. You could probably call them ahead of time as well, just do a search on Google, you should be able to come up the names. If you're going a specific time, they can tell approximately what will be hatching. If you can't find them yourself, let me know I can round some names up for you. We just came back yesterday from a week of fishing up in that area. The best fishing right now is on the Madison River below the dam of Hebgen Lake, just 15 miles west of the park.

elk hair cadis in a 16-18 would be a good starting point.

Ok thanks ill try this.

cowgal

Im goin to leve tommaro and im fishin around the livingston area. and i herd the area was getting alot of fish. could you give me some leads on what flys to use and where to go to find info in town?

predatorhunter

The water is probably still a bit high & stained, so I would say its too early for stoneflies or mayflies. Try caddis flies or big streamers or buggers, 2 1/2" to 3" long.

I found this list of flyshops in the Livingston area. Might want to give some of them a call.

http://www.fedflyfishers.org/conclave2005/flyshops.php

The following list has some of the flyshops in West Yellowstone.

http://www.westyellowstonechamber.com/warmseason/fishing.htm

Good luck! Let us know how you did.

Thanks and ill let you guys know how i do.

Predatorhunter

Sorry i have not gotten back to you guys to tell you about my trip. lets just put it this way there is not many words. i was gettign 20 inch trout all diffrent kinds. well where i come from a good 6 inch trout is big. it was awsome

Predatorhunter

Just figured those grizzlies gotcha!! !!

The fishing always seems to be fantastic up there. Lots of fun!

Nope did not see any.