San Juan River

The upper San Juan around Pagosa is an interesting winter fishery as hot spring inflows help water temps. Its still winter fishing, so you will need to dial your nymph rig just right to catch something, but the warm water helps. Smaller nymphs will be your friend.

Patterns/Bugs:
Nymphs: Prince nymphs 14-18, Pats Rubberlegs 8-12 or Jigged Pats 8-12, Black and Blue Copper Johns 14-18, Pheasant tails 18-22, Juju Baetis 18-20, Disco Midge 18-20, Rainbow Warrior 18-22, Flash Midge Pupa 18-22.

Its winter round these parts and the San Juan Quality Waters is one of the only options for wetting a line.
Your best bet is an attractor junk fly followed by a baetis nymph or midge pupa. The lake is beginning to turn over, but fishing remains good. There are still some baetis and midge hatches causing fish to look up, so be prepared with a few dries.

Patterns/Bugs:
Attractor nymphs: Leeches, San Juan Worms, Eggs, Annelids in 18-22.
Midges 20-26: Black Flash Midge Pupa, Tavs Big Mac, Bling Midge, Grey and Olive Midge Pupa
Midge Dries: Griffith Gnat 18-22, Bunny Midge 20-24.
BWO Nymphs: Foam Wing RS-2s 20-24, Killer May 20-24, Juans Sniper Baetis 22-24, Juans Jedi Master 22-24, All Flavors of WD-40s #20-24.
BWO Dries #20-24: BWO Extended Body, Barrs Vis-A-Dun, Juans Smoke Jumper Baetis.