Post-runoff window opens on the Colorado River with green drakes on deck

What's Biting

What's Next

With the Colorado River sitting at 2,870 cfs and declining off its runoff peak — Crystal Fly Shop (CO) is already calling similar flows at Glenwood Springs 'the back end of runoff now' with conditions ripe for action — the next several days should bring continued flow decline and clarity improvements through the Colorado mainstem corridor. As the river falls, Crystal Fly Shop notes that fish will progressively 'push away from the banks,' shifting the most productive zone from tight pocket-water and bank-hugging presentations toward mid-current seams, deeper flats, and transitional riffle edges. Anglers working rubberleg stone nymphs and heavy attractor rigs should begin adding PMD and green drake nymph imitations to the rotation in preparation for the shift.

The headline event on the near horizon is the green drake emergence. Crystal Fly Shop projects green drakes 'in full force in another two weeks or so' on the Colorado drainage below Carbondale, with similar timing likely on the mainstem river and along the Arkansas corridor. Golden stones, PMDs, and caddis are also named as imminent additions to the hatch lineup. Plan your day in layers: nymph through the morning hours with stone and PMD imitations, watch for green drake and PMD emergers as the sun climbs, and stay into the late afternoon for caddis — Crystal Fly Shop notes that overcast days will extend the dry-fly window significantly and push more fish to the surface.

Water temperature at 66°F is the primary watchpoint heading into the weekend. Trout approach physiological stress in the upper 60s; fish the first two to three hours after dawn when overnight cooling keeps the river at its coolest reading, and keep net time short on any released fish. If a heat pulse pushes afternoon temps past 67–68°F before flows drop further, voluntary morning-only sessions are a sound choice on both the Colorado and Arkansas drainages.

The waning crescent moon this weekend limits pre-dawn ambient light, which typically extends the low-light feeding window at first light — a favorable alignment for anglers targeting the coolest, most productive hours of the day on either river.

Context

A typical mid-June on the Colorado and Arkansas rivers finds the runoff peak just receding and guide floats ramping up — but 2026 is running ahead of schedule. Cutthroat Anglers (CO) reported in their May update that 'Colorado snowpack is historically bad' and that the state faces 'a much different season this year.' A low-snowpack winter produces earlier, smaller, and shorter runoff pulses, which means the post-runoff prime window — normally the final two weeks of June and first weeks of July — is arriving early and may close sooner than anglers accustomed to a standard Colorado season expect.

For context, Crystal Fly Shop (CO) was already describing the Colorado River as being on 'the back end of runoff' in early June at flows comparable to our June 12 gauge reading. In a normal snowpack year, that description would not arrive until late June at the earliest. The compressed timetable cuts both ways: less total water through the summer, but the prime transition window is open right now.

Cutthroat Anglers guide Matt Campanella offered a constructive reframe on the low-water outlook: 'the fish that remain are active, grouped up, and ready to bite for the angler willing to hike a little further or cast a little lighter.' Low-water seasons concentrate trout into predictable lies — deep runs with overhead cover, oxygenated riffles, and shaded mid-river pools — making fish easier to locate while demanding a lighter presentation and finer tippet than typical early-summer conditions require.

Despite the unusual hydrology, the hatch calendar appears to be tracking close to its normal sequence. Green drakes, golden stones, PMDs, and caddis are all lining up in their typical late-June order per Crystal Fly Shop — a reassuring sign that the biological rhythms of the fishery are intact even as water volumes run lean. On the access front, MidCurrent recently covered a landmark Colorado acquisition involving the Tolland Ranch, expanding public fly fishing access to previously private water in 2026 — a meaningful addition for a state managing rising angling pressure on its blue-ribbon corridors.