Green River tailwater browns and rainbows in a prime June window

What's biting

What's next

With water at 55°F and flows holding at 1,210 cfs (per USGS gauge 09234500), the Green River tailwater enters this week in favorable shape. The immediate outlook hinges on Bureau of Reclamation releases from Flaming Gorge Dam, which can shift flows within 24 to 48 hours depending on irrigation demand — worth a quick gauge check before the drive out. At current levels, wading is comfortable throughout the A, B, and C sections; if flows climb above 1,500 cfs, deep crossing points tighten and bank-side positioning becomes more important.

Timing matters more now than it did a month ago. With the summer solstice just past, midday air temperatures are at their seasonal peak and surface activity can flatten out during the warmest hours on exposed mid-river flats. Early morning sessions — on the water by 6 a.m. — tend to produce the most consistent dry fly action before the sun fully loads the canyon. Late evening is the other prime window, when canyon walls shade out and a caddis or PMD spinner fall can trigger visible rises across the softer flat-water tailouts.

Yellow Sallies are likely the most actionable hatch over the next two to three weeks. Caddis Fly (OR) recently spotlighted the Yellow Sally nymph as a cornerstone of summer dry-dropper setups across the western U.S., and the Green River's A and B sections historically see Yellow Sally activity run from mid-June through mid-July. A size 14–16 Yellow Sally dry on top with a size 18–20 soft-hackle or hare's ear dropper covers both feeding lanes simultaneously. On bright, high-sun days, transition to a heavier nymph rig — scuds and midges worked near the bottom along deeper channel edges.

MidCurrent's recent Tying Tuesday coverage highlighted sparse, high-contrast midge patterns built specifically for "the clear, pressured water of tailraces" — a precise description of the lower Green. These small offerings (sizes 20–24, beadhead, purple or black thread) shine during the mid-morning film-feeding window and during evening risers when fish are sipping emergers just beneath the surface. If you spot consistent heads in a slow tailout with no obvious surface food, midge pupae are the bet.

The first-quarter moon tonight means darker overnight conditions, which typically concentrates feeding activity into the low-light transitions at dawn and dusk. Plan weekend outings around the two-hour window on either side of sunrise for the most reliable action.

Context

The Green River below Flaming Gorge Dam is one of the West's most consistent blue-ribbon tailwaters, and late June typically marks the start of a sustained summer window that runs well into August. The dam's cold hypolimnetic releases buffer the water against intense high-desert heat — the difference between a tailwater holding at 55°F and an unregulated drainage at 75°F is the difference between prime trout habitat and thermal stress for the fish.

A flow of 1,210 cfs on June 22 sits comfortably within the historical mid-summer operating range. The Green tends to be managed between 800 and 1,800 cfs through the irrigation season, with periodic higher pulses when reservoir managers flush water downstream. At mid-range flows, wading is practical across all three named access sections; the A section typically draws the heaviest angler traffic, while the B and C sections offer more solitude for comparable conditions.

Hatch Magazine's recent feature on trout fishing through drought on Colorado's Front Range provides useful regional backdrop: western tailwaters have become increasingly critical refugia as multi-year dry cycles stress free-stone streams, and Flaming Gorge fits that pattern. When surrounding drainages in northeastern Utah run low and warm by August, the dam's releases keep the tailwater biologically productive and fish active well past when neighboring rivers become marginal.

No direct year-over-year comparison data for this specific fishery appeared in this week's angler intel feeds. Based on the gauge reading and seasonal timing alone, conditions appear on-schedule for what this water typically delivers in the third week of June: cool, clear, well-oxygenated releases from depth, moderate wadeable flows, and trout that have moved past post-spawn recovery into their summer feeding rhythm. For a more precise read on whether the season is running ahead or behind, a call to a Dutch John-area outfitter before your trip is the most reliable shortcut.