Tailwater trout dial in on tricos as Colorado drought drags on

What's biting

What's next

With no fresh gauge readings available for the South Platte or Arkansas tailwaters this cycle, plan around drought-driven low, clear flows rather than any short-term spike. Cutthroat Anglers' outlook for a historically dry 2026 season suggests conditions will stay stable and gin-clear through the week: trout pushed into deeper, slower holding water, feeding in tighter windows around dawn and dusk while the sun is off the water. Expect the bite to concentrate in the first hour or two of daylight and again as shadows lengthen in the evening, with midday hours turning technical as fish get spooky in skinny water.

Trico spinner falls, the summer signature Gink and Gasoline still talks about, should keep building through July on the South Platte, with the heaviest spinner falls typically stacking up mid-morning once water temperatures climb through their summer range. Anglers should be ready with light tippet and small trico patterns for the technical sight-fishing that follows.

Trout Unlimited's current terrestrial tip is well timed: as grasshoppers, ants, and beetles start dropping into the current through July and August, a dry-dropper rig built around a foam terrestrial should start pulling more aggressive eats than pure midge or mayfly patterns, especially on brighter, warmer afternoons.

On the South Platte's Dream Stream, Colorado Trout Hunters' trophy program targets lake-run browns and rainbows pushing up from the reservoir, but that migratory window is primarily a fall (and secondarily spring) event, not a midsummer one. Anglers hoping for shots at those bigger, mobile fish should plan trips for later in the season rather than this week; resident fish in that stretch will still eat, but the trophy run itself is still months out.

Given the drought backdrop, expect flows to keep trending down rather than up over the next several weeks barring a meaningful monsoon pattern. That argues for fishing early, covering slower and deeper water types, and being ready to downsize tippet and fly size as clarity increases. Watch local shop reports for the first real signs of the trico-driven morning rise intensifying, and treat any afternoon thunderstorm bump in flow as a short-lived window rather than a lasting reset.

Context

2026 is shaping up as one of the driest years on record for Colorado's tailwaters. Per Pat Dorsey Fly Fishing, the state has weathered lean water years before, with memorable low-water stretches in 1975-1978 and again in 2002, 2012, 2018, and 2020, but many longtime observers consider this year's drought the most severe yet, driven by some of the lowest snowpack totals on record. Cutthroat Anglers echoes that read, noting more than 60% of the Lower 48 sitting in some level of drought heading into summer.

For South Platte and Arkansas tailwater anglers, that context matters more than any single number: these rivers are largely reservoir-regulated, so summer flows already run lower and steadier than freestone rivers, but a drought year like this pushes releases even further down, concentrating fish into fewer, deeper holding areas earlier in the season than usual. That's consistent with what Cutthroat Anglers describes on Colorado water generally: fish grouped up and still catchable, just requiring more legwork and lighter presentations than a normal-water year.

On the trico front, nothing in this week's intel suggests the hatch is running early or late versus a typical Colorado summer; Gink and Gasoline's account of the South Platte's trico spinner falls describes a hatch dense enough to scoop handfuls of bugs off the water, a benchmark for the river in any year. There's no direct comparative signal in this week's sources on whether this year's trico timing is ahead of or behind normal, so treat the hatch as on its typical July schedule until a more current report says otherwise.