Spring trout bite peaks on Colorado and Arkansas rivers before runoff crests

What's Biting

What's Next

With flows at 1,880 cfs and water sitting at 65°F, the Colorado River is in a critical late-spring transition. The next two to three days will likely see continued snowmelt adding volume — Colorado's high-country melt typically accelerates through mid-May, with peak runoff arriving between late May and mid-June depending on elevation and snowpack depth. This year, Cutthroat Anglers reports the 2025–26 winter snowpack as 'historically bad,' which compresses the runoff window but also limits its severity. Watch for signs of color in the water: when clarity drops, fish retreat to the softest holds near the banks and in backwater eddies behind boulders and logjams.

Hatch timing to plan around: Pat Dorsey Fly Fishing flagged that warm weather has pulled the hatch calendar forward across the Rockies. Caddis emergences — typically a late-May event at elevation — may already be firing on warm afternoons, and PMD (Pale Morning Dun) hatches become reliable in the 60–65°F window the river is now hitting. Watch for sipping fish in tailouts between 10 a.m. and 2 p.m. AvidMax Blog's recent midge-tying content (Chocolate Foam Back, Titan Tube Midge) reflects that midges remain productive in cooler morning sessions, especially on regulated tailwater sections like the Frying Pan, where Crystal Fly Shop reported gin-clear conditions at 76 cfs in late April — a controlled flow that buffers runoff and should fish well through the peak.

Arkansas River outlook: The upper Arkansas gold medal water is likely in a similar warm, active window. At river temperatures approaching mid-60s in mid-May, trout feeding activity peaks — this is the range where both rainbow and brown trout are most aggressive before summer heat triggers thermal stress. Expect caddis swarms building through evening and consistent nymph fishing in deeper runs through the day. Lower-river sections approaching Cañon City and Pueblo warm further, where smallmouth bass begin pushing to shallow structure as temperatures climb toward the upper 60s.

Weekend planning: Aim for first light on both rivers. Mid-day snowmelt can push flows slightly higher and add turbidity by afternoon; early sessions give you the clearest water and most willing trout. A waning crescent moon means darker overnight conditions, which typically correlates with stronger dawn surface activity. If conditions allow wading, concentrate on inside bends and pocket water behind structure — higher flows push fish off the fastest currents and into predictable holding lies.

Context

A mid-May flow of 1,880 cfs on the Colorado River near Cameo is moderate-to-high by historical standards, though conditions this spring are far from typical. Cutthroat Anglers describes the 2025–26 winter as 'historic for all the wrong reasons,' with statewide snowpack tracking far below average. In a full-snowpack year, Colorado and Arkansas River flows would typically be approaching or past blowout levels by mid-May — cold, turbid runoff that shuts down fly fishing for weeks. The current combination of sub-2,000 cfs flows and 65°F water in mid-May reflects that thin snowpack directly; in a big snow year, these numbers would be expected a month earlier.

Pat Dorsey Fly Fishing corroborates the early-season character, noting the river 'is beginning to wake up much earlier than normal' with warm-weather trends pushing hatch activity forward. Crystal Fly Shop's late-April Colorado River report calling conditions 'sensational' at 1,380 cfs confirms the early opener — that coveted pre-runoff window arrived ahead of schedule and has been extended by the low snowpack.

Hatch Magazine's recent coverage of the western drought claiming Antero Reservoir in Colorado's South Park — Denver Water announced plans to drain it entirely this spring — signals the scale of low-water stress statewide. While the Colorado and Arkansas drainages are separate from the South Platte, the same below-average precipitation underlies all three, and the long-term implications for cold-water trout habitat bear watching.

On the access front, MidCurrent reports that a conservation acquisition at Tolland Ranch is expanding public fly fishing access in Colorado in 2026 — a modest bright spot amid the drought news. Overall, this season is shaping up as a compressed but high-quality spring window: conditions arrived early, the runoff peak will likely be less severe than average, and May fishing on both the Colorado and Arkansas rivers represents the best opportunity before summer low-flow and warm-water patterns set in.