Eastern Sierra trout settle into fall patterns

What's biting

What's next

Expect the best surface activity in the warmest part of the day, when Blue Winged Olives tend to emerge, especially under cloud or light drizzle. Early and late, switch to a small nymph or midge pattern fished deep and slow. Flylords Mag notes that past mid-October the brown trout spawn is in full swing in many areas, so Brown Trout may be paired up on redds. Give spawning fish space and avoid wading through gravel beds where eggs may be buried. Fish stacked in pools ahead of the spawn are often more willing to eat, but check regulations for any seasonal closures before you go.

With the moon waxing gibbous, expect brighter nights and possibly less aggressive feeding at dawn. The mid-morning to early afternoon window is the one to plan around. Keep tippet light and approach quietly, since low and clear water makes fish wary. Per Pat Dorsey Fly Fishing, anglers should watch temperatures closely and stop fishing when water runs warm, although cool autumn nights make that less of a concern now.

Context

Late October on the eastern slope is typically a transition period. Summer terrestrial and caddis patterns fade, small mayflies and midges take over, and Brown Trout shift toward spawning behavior. Crowds thin out, and quiet days on the water are common. This year has been marked by drought across the West, per several Colorado shops, so fish often concentrate in the deeper, cooler runs that still hold water. That tends to make the fish easier to find but less forgiving of heavy presentations. Anglers who stay mobile, downsize flies and fish the soft edges generally find the most consistent action through the end of the month.