South Fork Boise River

Flows are dropping through September toward 300 cfs by late month, opening up better wading as the water recedes. Water temperature hit 56°F on September 5, setting up prime fall fishing as air temperatures cool. Watch for Pinks early in the month followed by Blue-Winged Olives, October Caddis, craneflies, and Flavs—multiple hatches can stack up on the same evening. Overcast conditions with light drizzle favor consistent insect activity and surface feeding.