Colorado Tailwater Holds Prime Trout Temps as Drought Strains AZ Bass Waters
The USGS gauge on the Colorado River (site 09380000) recorded 60°F water temperature and 10,400 cfs flow on June 12, ideal conditions for rainbow trout in the tailwater fishery below Glen Canyon Dam. At 60°F, trout metabolism runs high and feeding windows extend well into the morning before summer heat takes hold. Elevated flows above 10,000 cfs push fish off exposed gravel bars and into seams and back eddies, so focus presentations along current breaks and sheltered shoreline structure. Elsewhere in Arizona, the picture is more sobering: Wired 2 Fish reports that San Carlos Lake, long regarded as a trophy largemouth bass, crappie, and flathead catfish destination, suffered a complete fish kill after drought-driven drawdowns triggered oxygen depletion. The Colorado and Salt River corridors are better insulated from that class of event, but summer drought stress will bear watching. For Salt River bass, Tactical Bassin recommends swing-head jig and crankbait combinations along bottom structure as early-summer fish push to depth.
Current Conditions
- Water temp
- 60°F
- Moon
- Waning Crescent
- Tide / flow
- Colorado River flowing at 10,400 cfs (USGS gauge 09380000); elevated flow: fish will hold in seams and back eddies rather than open midchannel.
- Weather
- Check local forecast before heading out.
New to these readings? What do water temp, cfs, tide, and moon phase actually mean for fishing?
What's Biting
Rainbow Trout
nymphs and streamers drifted through current seams and back eddies
Largemouth Bass
crankbaits and swing-head jigs on bottom structure
Smallmouth Bass
morning topwater then drop to deeper rocky structure
Flathead Catfish
live bait on deep holes after dark
What's Next
Over the next two to three days, the Colorado River tailwater should maintain favorable conditions for rainbow trout if dam releases hold near the current volume. A 60°F water temperature in mid-June reflects the natural insulation that Glen Canyon Dam provides, holding tailwater temps well below what ambient Arizona heat would otherwise produce. That buffer has limits, and by mid-to-late June afternoon surface temperatures in shallower sections can creep upward. Plan sessions around the first two hours of daylight, when the waning crescent moon's reduced overnight light combines with peak trout activity near dawn.
Anglers should keep water temperature trends in mind as the season progresses. Field & Stream's current guide to trout fishing and temperature stress is worth reading ahead of a trip: once temps push into the upper 60s, rainbow trout enter higher-risk territory for catch-and-release mortality. At 60°F, conditions remain solidly productive, but monitor afternoon readings as June deepens. If fish are rolling near the surface or stacking in unusually deep water without feeding, ease the pressure and let them recover.
Elevated flows will concentrate fish away from exposed midstream positions and into current seams, bank eddies, and the calmer water behind large boulders. Nymphs and streamers drifted through these holds should be the primary approach; dry-fly action is possible during low-light windows if hatches are active, but high flow makes drag-free drifts more technical than usual.
For bass on the Salt River, Tactical Bassin's breakdown of early-June techniques points to a productive window right now: swing-head jigs and crankbaits in the 6- to 10-foot range are the recommended combination as fish move off post-spawn structure and begin feeding aggressively on deep structure. Morning topwater along rocky shorelines is worth a few casts before the sun climbs high, then transition down as midday heat builds.
One caution worth noting: the drought-related fish kill at San Carlos Lake, reported by Wired 2 Fish, is a reminder that Arizona's reservoir fisheries are under real stress this summer. If you're planning any still-water bass or catfish trip in the state, verify current access and water levels before making the drive. The flowing-water systems (the Colorado tailwater and Salt River canyon reaches) are comparatively more buffered from collapse-type events, making them the more reliable destinations for the weeks ahead.
Context
For the Colorado River tailwater at Lees Ferry, a 60°F reading in mid-June sits on the cool side of what is typical for the season, a reflection of Glen Canyon Dam's consistent cold-water releases, which normally hold the tailwater in the high 50s to low 60s even as Arizona's summer heat builds overhead. What changes year to year is flow volume: summer operations often scale releases upward to meet downstream commitments, so week-to-week swings of several thousand cfs are normal for this stretch. Anglers planning multi-day trips should check Bureau of Reclamation release forecasts, as significant flow changes can shift fish positioning overnight.
The wider 2026 drought picture adds important context. Wired 2 Fish's reporting on San Carlos Lake's total fish kill illustrates how quickly Arizona's still-water fisheries can deteriorate when prolonged drought combines with water management decisions. Hatch Magazine's guide to fishing through drought (framed around high-desert river systems broadly) applies directly here: shorter sessions, deeper-water targeting, and careful post-fight fish handling are best practices on any stressed western river this summer, and anglers on the Colorado and Salt systems should take that advice seriously as the season peaks.
No angler-intel sources in this week's feeds report directly on current conditions at Lees Ferry or on the Salt River canyon sections, which limits direct year-over-year comparison. For what's actually on the bite right now, local fly shops or outfitters near the water remain the most reliable real-time source. In a typical mid-June season on the tailwater, nymph rigs and small streamers produce consistently as long as flows and temperatures stay in the range we're seeing now.
This report is synthesized by Hooked Fisherman from real-time NOAA buoy data, USGS stream gauges, and current reports across regional fishing blogs, captain updates, and angler forums. Source names are cited inline where they appear. Check local regulations before keeping fish. Never trust a single source for a trip decision.