The Big Wood
The Big Wood is running at 816 CFS in Hailey, which is high. The Wood is on the drop, but it probably won't fish well for another couple of weeks. If you want to give it a try anyway, fish heavy stonefly nymphs, Green Drake nymphs, and streamers. As long as the water isn't muddy, you should be able to pick up a fish here and there.
Silver Creek
Silver Creek is a fantastic early season fishery. These fish haven't seen flies in a few months, which will be apparent when they eat a fly on a presentation that will provoke laughter in August. Opening day in the preserve is always a party, and the fishing can be really good. If the weather holds up, look for PMDs mid morning. If the bugs don't show up, try stripping wooly buggers and other streamers. This can be very productive early season. This time of year the point of rocks and willows accesses can fish well too, so if the preserve gets a little crowded do some exploring downstream.
South Fork of the Boise
The South Fork is running at 1610 below Anderson Dam. This is a great level to float, but wading can be a little tricky. Fish large stonefly nymphs under an indicator for best results. Salmon flies should be showing up in a few weeks so check under rocks for those huge bugs. It's also worth throwing streamers at the bank while you float.
BROWN DRAKE ALERT
With the mild spring we've had this year, it should be another early Drake year. I guessed June, 2nd which means they'll probably go off sometime in July. Swing by the shop at we'll keep you updated on the progress of these big brown bugs.