Snake and Salmon Rivers cool into a fall trout and steelhead window

What's biting

What's next

With a New Moon, nights are dark and mornings start cold, so expect the best action when the sun first hits the water and again through the warmest part of the afternoon on the 57°F water. Flows are steady across the three gauges, so we don't expect a sudden blowout or major clarity swing in the next two to three days unless rain moves in. Check local forecast before heading out.

For technique, Caddis Fly (OR) lists the Perdigon as a hot fly this fall, and Gink and Gasoline (fly) stresses adding enough split-shot to get nymph rigs into the strike zone, which suits the heavier 3,000 cfs flow. Trout Unlimited also frames weight as the key variable on a nymph rig. If you are fishing egg patterns behind spawning fish, Flylords Mag highlights the Atomic Egg as an easy tie that works.

Plan for early starts on the cooler main-stem water and a later start on the warmer, lower-flow stretch. Dark-moon mornings can be slow until light hits the water, so there is no rush before first light.

Context

Mid-October is a transition period for Snake and Salmon River anglers. Water has dropped out of the summer warm range, trout shift toward nymphs, small mayflies and egg patterns, and Steelhead typically push upriver through fall. Conditions look on schedule for the season, with temperatures in the low to mid 50s being typical for this time of year. Regulations and seasons for Steelhead vary by section, so check state regs before keeping fish.