Low Runoff Delivers Rare Late-May Clarity Across Colorado's Trout Rivers

What's Biting

What's Next

With water temps at 62°F on the Colorado, trout are sitting squarely in their prime feeding range. That window typically holds until flows or air temps push surface readings above 68°F, giving anglers a productive stretch through at least the next several days if warm conditions persist.

The hatch calendar is the thing to watch right now. Pat Dorsey Fly Fishing (CO) notes that spring's early warmth has accelerated the seasonal transition: midge hatches remain reliable morning and evening, but Blue-Winged Olives and caddis are increasingly sharing the stage. AvidMax Blog (CO) has been spotlighting the Chocolate Foam Back midge emerger — fished just under the surface film — as effective for tailwater trout keying on vulnerable emergers. For those Euro-nymphing, the Jigged CDC PT Tungsten highlighted by AvidMax Blog (CO) — jig hook, tungsten bead, point-up orientation — is built for the fast, rocky seams common on both the Colorado and Arkansas.

The low-water character of this season creates tactical advantages worth planning around. Per Cutthroat Anglers (CO), fish are concentrated rather than dispersed — meaning runs and deeper pockets that might hold scattered fish in normal years are stacked this season. The trade-off is pressure sensitivity: gin-clear conditions demand fine tippet (6X or lighter), longer leaders, and careful downstream approach angles. Early mornings and late evenings will be the most productive windows as surface activity peaks at low light.

On the Arkansas, late May typically marks the tail end of runoff, and with this year's historically reduced snowpack per Cutthroat Anglers (CO), most of the high-water disruption may already be in the rearview. Expect the Gold Medal water between Salida and Cañon City to be in excellent shape heading into the holiday weekend. First Quarter moon carries no tidal influence here on freshwater, but overhead and underfoot lunar periods can sharpen mid-morning and late-afternoon bite windows on pressured tailwaters. Pack midge emergers, soft-hackle wets for the caddis transition, and a tight-line nymph rig for mid-day dead periods when hatches quiet down.

Context

For Colorado's trout rivers, late May normally represents the peak of spring runoff — the period when snowmelt pushes Colorado River flows well above 3,000 cfs near Cameo and turns most freestone tributaries into unfishable brown water for weeks. The Colorado reading 2,130 cfs at 62°F on May 23 is a clear signal of just how unusual this season has been.

Cutthroat Anglers (CO) have guided Summit County rivers since 1999 and described this winter as unlike anything in their tenure: "We have seen our fair share of variable seasons over the years. This winter has been historic for all the wrong reasons." That historically low snowpack — which Cutthroat Anglers' Matt Campanella notes has put more than 60% of the Lower 48 in some level of drought — means runoff has been diminished and earlier-to-peak than normal. The net result for anglers: Colorado's prime wade-fishing window arrived weeks ahead of schedule and has held well into late spring.

In a median snowpack year, guides steer clients to tailwaters through most of May while waiting for freestone rivers to clear. Crystal Fly Shop (CO) was already calling the Colorado River "sensational" in late April, citing stabilizing flows and peak activity that in typical years arrives in early June — a leading-edge quality that has continued into late May.

Colorado Trout Hunters offers an important counterpoint: despite the broader drought headlines, the South Platte's Dream Stream delivered "one of the best runs of migratory fish we have seen in quite some time" this spring. Not every measure of the season is behind. Where fish are concentrated — in tailwaters, deep canyon runs, and Gold Medal stretches — the fishing has been exceptional for anglers willing to adapt their presentation to the clear, lower-flow reality of 2026.