Colorado tailwaters hold fish as mainstem runoff climbs toward peak

What's Biting

What's Next

With the Colorado River near Cameo now running 3,200 cfs, the next two to three days will reveal whether we're cresting early or still climbing. Rising flows on free-stone reaches typically push trout off the main current and into soft-water edges — slack behind boulders, inside bends of meanders, and tributary mouths where clearer water meets the murky main stem. If you're targeting the Arkansas River corridor, expect similar seasonal dynamics as Collegiate Peaks snowmelt adds volume to lower-elevation reaches.

Tailwater sections remain your most reliable option through this transition. The Frying Pan River, a Colorado River tributary, was running gin-clear at approximately 76 cfs in late April per Crystal Fly Shop (CO), and tailwaters buffered by reservoir releases tend to lag the mainstem swing by days to weeks. Reaches below major reservoir influence on the Arkansas will behave similarly. At 51°F, trout metabolism is picking up — fish are feeding more actively than in winter — but slight turbidity in the mainstem keeps them keyed on sub-surface presentations.

For flies, AvidMax Blog (CO) has been spotlighting midge-centric patterns all spring: their Chocolate Foam Back (a midge emerger riding just below the surface film), the Titan Tube Midge for gin-clear tailwater conditions, and the Jigged CDC PT Tungsten for Euro-nymphing in faster seams. With caddis beginning to emerge on warmer Colorado reaches, a two-fly rig pairing a tungsten nymph with a caddis pupa dropper is worth carrying.

Timing-wise, the waxing crescent moon phase favors low-light morning and evening feeding windows — focus on the two hours around sunrise when overnight cooling settles the water and hatch activity is just ramping. Mid-afternoon windows can also produce on stable tailwaters. Weekenders should plan to be on the water before 8 a.m.; on runoff-swollen free-stone rivers, warming afternoon temperatures accelerate snowmelt and can raise flows and turbidity rapidly through midday. If mainstem conditions deteriorate by the weekend, pivot to any tributary with reservoir influence upstream.

Context

A mid-May flow of 3,200 cfs on the Colorado River at Cameo would be unremarkable in a big snow year — but 2026 is the opposite. Cutthroat Anglers (CO) described this winter as "historic for all the wrong reasons" in their May update, noting that the state's snowpack is "historically bad" — a characterization that aligns with what Crystal Fly Shop (CO) flagged in late April when they called approaching runoff a "looming threat" while simultaneously celebrating what they described as "sensational" peak-activity conditions at 1,380 cfs near Glenwood Springs. The fact that flows have more than doubled at the Cameo gauge in less than four weeks, despite thin snowpack, suggests melt is running warm and fast. In a robust snowpack year, Colorado River flows at this gauge can push well above this level well into June; this year, the runoff peak will almost certainly arrive earlier and exit faster — potentially wrapping up by late May or early June rather than dragging into summer.

For Arkansas River anglers, low-snowpack years historically mean better early-season wade fishing on lower-elevation reaches, where manageable flows and clearer water can persist through May. The trade-off is a compressed spring window followed by an earlier-than-usual shift to summer low-water conditions that concentrate fish and can elevate temperatures by July.

MidCurrent recently highlighted a meaningful access expansion in Colorado: a landmark acquisition of the Tolland Ranch opened miles of previously private water to fly anglers in 2026, described as a strong spring for angler access on public land. No specific fishing reports from that stretch have surfaced yet in available feeds, but it is worth monitoring as guides and anglers begin covering newly opened ground. Overall, the defining characteristic of the 2026 season on Colorado's rivers will be brevity — a fast-moving spring window that rewards anglers who act early.