The Big Wood River has been fishing very well on the right days. I like overcast and warmer days for good fishing. There are some fish on top feeding on midges but the nymph fishing can be very effective. Dry flies in sizes 20-24 work well and also have some light emergers that sink very gently. One of my favorites is a small brassie with no bead in red and copper colors. Fish this fly under a big adams Parachute or behind a bead head fly with a strike indicator of your choice in the deeper runs. Best time of the day is in the afternoons.
Silver Creek is now only opened from Hwy 20 bridge downstream through Picabo through the end of February. You can find a few midging fish in this section but streamer fishing with leeches, buggers, and sculpins can be the best method for this time of year.
The Big Lost below the Dam is opened year around and can always be a good option in the winter months. Pick a calm overcast day and the fishing can be very good. It’s a drive but well worth it from the Sun Valley area.