You'll find trout in virtually every stream in the San Juans. I grew up fishing the Creede area and lived for 2 years in Lake City. I learned to flyfish for trout at age 14 (1960) on the Rio Grande. For July and August I would have nymphs (Goldribbed Hare's Ear #12-16; Pheasant Tail and beadhead version #16-18; Prince Nymph and beadhead version #10-14), grasshopper patterns (Joe's Hopper, Muddler Minnow #6-10), streamers (weighted Muddler Minnow, Black Nose Dace, Black and Olive Woolly Bugger #6-10), and of course drys (Parachute Adams #12-14, Goofus Bug or Humpy #12-16, Royal Wulff #10-14, Griffith's Gnat #18-20).
Start using a double fly rig either a large dry or grasshopper pattern with a nymph 18-24" below during morning till evening, then switch to a streamer in the late evening once the hatches stop. Then it is time for the biggest browns to come out...be ready in the bigger rivers (Rio Grande, Gunnison, Conejos ) for a good fish. The smaller streams are usually less crowded that time of year (Henson Creek, the Blue, Los Pinos, Rat Creek, small head waters of bigger rivers, tributaries of all the bigger rivers).
Your rig should be something like a #5-6 weight forward floating line and 9' rod with 9' tapered leader and 5x tippet. Anything will work but some rigs are just easier to use than others.
In the lakes I'd use a spinning rod with a fly and bubble. You might want to have a few spinners as well (yellow Mepps with red dots and hair on hook, blue and silver Kastmaster, various color spoons).
You'll have a great time in the San Juans whether you catch fish or not. Lots of big game...deer, elk, bear, bighorn, mountain goat, etc.
They are beautiful! Enjoy! I am jealous!:wings:
Ooops I forgot one of the best dry flies...Elk Hair Caddis #14.