The Piedra drainage is mostly shut down through the winter due to ice and inaccessibility. If you find any open water, nymphs will be your friend.
Patterns/Bugs:
Nymphs: Duracell Jig 12-14, Orange Crush 14-16, Prince nymphs 10-16, Runt Stone Golden 12-16, Pats Rubberlegs 6-12, 20 Incher 10-14, Pheasant Tails 16-20