Ok, here are my favs. I've been fishing Southern Alberta and the mountain parks for the last few years and have been thinking about fly selection way too much as I drive around western canada for work.
Dries-
1. Stimulator- big to small sizes.
2. Elk Hair Caddis- though I do like some of the other caddis patterns with the prodiment antenee, like the Goddard caddis
3. Parachute Adams
4. Foam Ant
5. Tiny, thinly dubbed body, Black Adams (size 18 ish) for a midge imitaition
Nymphs-
1. Bead Head Pheasant Tail Flashback- I've been tying them on pupa hooks with great success.
2. Evil Weevil- again I've tied some on Pupa hooks
3. Brassie- in brass, red, and black.
4. Double Bead Stone Nymph- Black, Brown, and Gold
5. Cooper John- Red and Black
Streamers-
1. Cone Head Wooly Buggers - keying in on the colour that fish like is key. Olive, Brown, Black, White are my favs.
2. Wooly Buggers- unweighted and in smaller sizes fished dead drift like a nymph.
3. Cone Head Bow River Bugger- good bull trout fly.
4. Clouser Minnow