Tailwater trout settle into fall pattern below the dam

What's next

Water temps in the upper 40s to low 50s should hold over the next two to three days, so expect steady behavior rather than a sharp change. The three gauges sit within two degrees of each other, which points to stable conditions across the system.

Plan around the warmest part of the day. Small mayfly and midge activity typically peaks from late morning through mid afternoon in October, and that is when fish are most likely to look up. Early mornings tend to be quieter with fish holding deeper, so run a nymph rig then and switch to a dry or emerger if rises appear.

The waxing crescent moon sets early in the evening, so dark nights offer no moonlight advantage for late sessions. Midday is the better bet. Per MidCurrent's Tying Tuesday features, midge-style patterns work well in clear, pressured tailrace water, and small streamers can pull aggressive fish as predators move into shallower lies ahead of colder weather.

Context

Mid-October is typically the shoulder of the fall season on Rocky Mountain tailwaters. Cooler air and water bring trout out of summer lethargy, and fish feed hard ahead of winter. Flows from dam releases usually stay steadier than on freestone rivers, so tailwater fishing often holds up even when other waters turn tough. Readings of 49 to 51°F are on schedule for the season. Brown trout tend to move toward spawning behavior this time of year, so wade carefully and avoid stepping on gravel redds. Check state regulations and any seasonal closures before heading out.