We’re blessed with lots of great fly shops out here. If shopping for tying materials is your goal, though, try Charlie Craven’s shop. His selection of tying materials may be the best of any shop anywhere. Here’s the link. http://www.charliesflyboxinc.com/flybox/index.cfm
There are a couple shops in Carbondale/Glenwood, one right on the west side of the road as you enter Glenwood from the Aspen side. Not sure of the name, but I drive by it once in a while!
DUB has the shops right. Taylor Creek has a shop in Aspen at Aspen Sports. They are in full Ski mode now. I think you will have to go to Basalt For tying stuff. Fishing up by the dam on the Pan is pretty good right now.I went up on Sunday