Upper Owens Fly Fishing Report : Mammoth Lakes, CA – 7.1.25
The Upper Owens River continues to flow steadily at around 80 cubic feet per second, this fly fishing legend continues winding through a beautiful, open valley just below the town of Mammoth Lakes. With summer settling in, the meadows are green, insect activity is increasing, and water clarity remains good—ideal conditions for those looking to enjoy some peaceful, scenic fly fishing. While the major push of trophy rainbow and cutthroat trout has tapered off since the peak of the spring migration, there are still opportunities to connect with a few of these larger holdovers. Anglers willing to hike and put in the time may find success targeting deeper pools, undercut banks, and faster riffles where these big fish tend to hold as the days warm up.
Fishing remains productive with a balanced mix of attractor patterns and more realistic imitations. Subsurface offerings like midges, San Juan Worms, Pheasant Tails, Soft Hackles, and Parachute Adams in sizes #12–18 are working well. For those looking for surface action, Blue-Winged Olives (BWOs), Caddis, and small attractors are pulling in smaller trout that are starting to rise more regularly with longer daylight hours and warmer afternoons. Early morning and evening remain the best windows for dry fly activity, while midday fishing continues to produce below the surface.
Although the spring run of fresh fish has come and gone, anticipation is already building for the next seasonal movement. Traditionally, late April through May we can find large migratory holdovers, even in early summer, the Upper Owens holds a surprising number of quality fish for those willing to explore and fish methodically. The river’s combination of easy access, solitude, and the chance to hook a true Eastern Sierra trophy makes it a rewarding destination even outside of peak times. Be sure to tread lightly, handle fish with care, and enjoy the serenity this special stretch of water has to offer during the early summer season.
Call or text the STM Fly Shop for more info or to book a guided trip 760-873-0010
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