Large brown trout in the lap of an angler on a riverbank near Mammoth Lake California.

Upper Owens Fly Fishing Report : Mammoth Lakes, CA – 7.1.25

July 1, 2025
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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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Upper Owens River October 2024

Upper Owens Fly Fishing Report : Mammoth Lakes, CA – 10.20.24

October 20, 2024
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The Upper Owens River, located just down the road from Mammoth Lakes, California, is currently in excellent condition for fishing. The water levels are low and clear, creating optimal visibility and allowing anglers to spot both resident fish and some larger trout migrating from Lake Crowley.

The clear water has made for some exciting fishing opportunities. Anglers have been successful primarily targeting the jumbo trout arriving from Lake Crowley, with nymphs and streamers proving to be the most effective methods. These larger fish are often found in deeper pools and along the river’s structure, making it essential to present your flies effectively.

In addition to the trophy-sized trout, the river is also home to a healthy population of smaller resident trout. These fish have been responding well to a variety of dry flies, making for a fun and diverse fishing experience. Whether you prefer the thrill of sight fishing for larger trout or the excitement of catching smaller ones on topwater, the Upper Owens River offers something for everyone.

For those heading out, consider using a range of nymphs and streamers for the larger trout, while also keeping some small dry flies on hand for the more active surface feeders. As always, be mindful of the river’s conditions and adjust your approach accordingly.

In conclusion, the Upper Owens River is providing fantastic fishing opportunities this fall. With clear, low water and a mix of both jumbo trout and resident fish, it’s a great time to get out and enjoy what this beautiful stretch of water has to offer. Happy fishing!

Call or text the STM Fly Shop in Bishop, CA for more details or to book a guided tour – 760 873 0010

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young angler lands a trout on the upper owens river

Upper Owens Fly Fishing Report : Mammoth Lakes, CA -9.1.24

September 2, 2024
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The Upper Owens fly fishing report continues to be a positive reflection on the fishing in the Eastern SIerra. Flowing around ten minutes from Mammoth Lakes, CA, the Upper Owens has provided consistent fishing throughout the summer. Flows rates and water temperatures have been favorable throughout the season. This is because of the higher elevation, and the water source of the Upper Owens river.

We never really had an unforgettable hopper hatch this year and we can not really explain why. However the nymphing, dry fly fishing, and streamers have been effective pretty much every day. Flows are low, around 75 cubic feet a second.

Small Rainbow and Brown Trout can be caught on a variety of Caddis and Mayfly patterns throughout the river in some of the shallower runs and riffles. However, the deeper and darker holes hold the possibility of a very large unthinkable trout. Brown or Rainbow. Fish for these primarily with nymphs,.streamers are also very successful when presented by a well versed angler who understands the river.

Mornings are cooling off and things are starting to look like the start of fall. Although the temps do rise during the day showing us that the Eastern Sierra is not quite ready to let go of the hot Summer of 2024. https://www.sierratroutmagnet.com

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Call or text the STM Fly Shop in Bishop, California for more details or to book a guided tour. 760- 873 0010

Upper Owens River fly fishing !
trout of the Upper Owens RIver
beautiful brown trout held above the flowing water of the Owens River

Lower Owens Fly Fishing Report : Bishop, CA – 8.25.24

August 25, 2024
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The Lower Owens is now flowing at a very high rate right outside of Bishop, CA. Yes, the LADWP decided to crank up the river overnight instead of incrementing the flows little by little . At these flows the river will have very few places to fish even though the water is very clear and coming out of pleasant valley reservoir. We do not expect this to last for long as cool nights are on the way to freeze the runoff up in the high elevation sierras. Bugs are there and things are healthy. We anxiously wait for the fabulous Lower Owens to return to its fish worthy flows in order for us fly anglers are able to again sample the beautiful wild trout she contains.

Lower Owens river rainbow trout caught on a fly

Lower Owens Fly Fishing Report : Bishop, CA – 6.12.24

June 12, 2024
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The Bishop jewel, the Lower Owens River, flowing just outside of Bishop, CA has experienced massive flows recently but is now down to around a fishier flow of around 330 Cubic Feet/second (cfs). We are hearing a rumor that it may be this way for a decent while as repairs are needed far downstream. Of course the fish are taking advantage of this situation and using the lower pressures and flows to explore and become eating machines. We have noted more caddis activity in the area. Aggressive trout have been leaping and chasing caddis adults randomly in the river with some bends and back eddies more active then others. Most of the usual flies will lead to success on the Lower Owens currently. Peridons, Pheasant-Tails, Caddis Worms, Midges and other various attractor flies will find their way into a fishes mouth. Adult versions of Caddis, Mayflies and a few Midges are a good idea to have in the box as well in case of that top water activity beginning to happen right in front of you.

Call or text the STM Fly Shop in Bishop, CA at 760-873-0010 for more details or to book a guided trip.

Lower Owens Fly Fishing Report : Bishop, CA – 3.12.24

March 12, 2024
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The Bishop fly fishing report for the Lower Owens River is nothing but great news! Flows are at absolute prime levels for wading and accessing the river while still retaining enough flow volume to let the wild trout move about the river freely.

Hatches have been tempting us here and there and have been mayflies. Look for this to happen mid-morning to around 12:30. Although not a river wide event one corner can be alive with trout actively eating on the surface with the next corner not seeing any surface activity. Fish classic mayfly patterns in sizes #16 through #18.

As usual the nymphing has been absolutely great. Fishing with an indicator or Euro Style is your option for a great day of wild trout to your net. Most may fly nymph imitations will work when presented correctly. It is the job of the fly angler to figure out how deep to get the Flies and how quickly and how long to appropriate one’s time in certain areas are the keys to success. Our favorite nymphs have been all sorts of paradons, Frenchies, pheasant tail patterns, some caddis worms, and a variety of midges. We have been fishing in sizes #14 through #18.

Call or text the STM Fly Shop in Bishop at 760.873.0010 for more details or to book a guided tour.

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Upper Owens River rainbow trout on a fly rod

Upper Owens Fly Fishing Report – Mammoth Lakes, CA – 2.12.24

February 12, 2024
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The Upper Owens River, just below the town of Mammoth Lakes, CA has received a small blanket of snow which has drifted in a few lower areas but not made a significant impact on accessibility. Patches of grass and sagebrush remain, showing above the recent snowfall. In the morning the landscape is frozen solid and entry is relatively easy as most vehicles with ground clearance will have no problems. It looks like we have some above freezing temps on the way during the day which will make for slippery and gooey conditions as anglers advance on their afternoon departure from the banks of the Upper Owens.

The trout appear to be advancing up the river in better numbers recently. We have been finding a thriving and healthy population of very large trout this early February. They appear to be spread throughout the river system nicely. Appropriate your fishing time in the correct holding water, which will usually be the deepest and darkest parts of the river. This can also be a narrow section of the river where the banks tighten up to a darker slot of running water.

Flies can be a variety of spawning patterns or larger and smaller sized attractor nymphs in sizes #10-18. These can include; various San Juan Worm patterns, Pheasant Tail variations, Soft Hackles, Peridons and Midge patterns just to name a few. Most of the fish we see rising are very small trout trying to sneak in a quick bite, this is not why we come to the Upper Owens River. Streamers can also be a good choice to have along on a second rod. Fish the long seams and undercut banks to create a response. In a river this size this can be done with a sinking or floating fly line setup.

Overall the river is in great condition; with a very healthy big fish population and enough of a cloudy tint to hide us from the fish in this wide open area above and below the main Hot Creek confluence.

Call or text the STM Fly Shop at 760-873-0010 for more details on this dynamic fishery or to book a guided tour for a worthy fish!

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Lower Owens River Fly Fishing Report : Bishop, CA – 2.2.24

February 2, 2024
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The Lower Owens fly fishing report has taken a turn for the better! Running at 150 cubic feet a second just outside of Bishop, CA this jewel of a stream is ready for all those who have been waiting for contact with some amazing wild trout.

Extremely easy wading compared to many other streams the bottom is very friendly to cautious wading anglers. Brushy? Yes it can be. This is all negated when you enter the riverbed and make your way along the river from shallow edge to shallow edge. As will all dynamic moving water ways you can get into trouble when not reading the river correctly as you make your way along either bank.

With the warmer weather temperatures, declining full moon, and a small storm on the horizon we have been seeing some mayfly activity on the water. Not a river-wide event yet we have been seeing risers in the usual foamy runs and holes where the fish prefer to stick their noses above the water. We sure expect to see these hatches progress into full on dry fly days as we transfer into February and March.

Attractor nymphs such as Peridons in various colors in #14-20 have continued to be the local stars of the river. Soft Hackles, Pheasant Tail variations and Caddis Worms have all been taking fish. Euro Nymphing and Indicator nymphing have both been effective methods of extracting trout from the Lower Owens River.

Call or Text the STM Fly Shop in Bishop, CA at

Upper Owens Fly Fishing Report : Mammoth Lakes, CA – 12.18.23

December 18, 2023
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Just down the hill from Mammoth Lakes, CA, the notorious meadow stream of the Upper Owens, flowing through the long valley caldera is doing what it does best; supplying fly anglers will very large sized fish. Water is flowing well and very clear above and below the Hot Creek confluence. The very large Crowley Lake trout have made their way up the river and can now be found throughout the entire system in decent numbers. Fishing the deepest and darkest places, as well as riffles and deep runs could possibly produce an unforgettable experience with a trout of a lifetime. Access has been open and traction is good. Although, right now we are getting some precipitation so we will update this in the next couple of days. The large trout of the Upper Owens like to eat many different patterns; usually something along the line of steelhead patterns, attractor nymphs, and even micro mayfly patterns. We find ourselves trying out more patterns than usual on the Upper Owens, changing out flies often. Crowds can be anywhere from nobody to slightly annoying. There really is no rhyme or reason or a way to predict how many people turn out for the day. The storm hitting today could possibly move these big guys around or even better, bring more in! Stay tuned!

Call or text the STM Fly Shop in Bishop, CA for more details or to book a guided trip. 760-873-0010

@stm_fly_fishing on instagram to see more photos of amazing Owens River trout.

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Lower Owens Fly Fishing Report : Bishop CA – 12.18.23

December 18, 2023
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The Bishop, CA Lower Owens fly fishing report was amazing in November until they raised the water to difficult fishing levels. Now, we are finally seeing some reduction in these unusual winter flows which we have not seen before due to the incredible surplus of water from the amazing winter we experienced last year. Flows are currently at 320 cubic feet per second and are poised to drop more very soon with a 50 cubic feet per second drop this morning . The Lower Owens has experienced very little pressure this year after the big rain in March that raised all water levels in California and took us out of our drought problems. This volume of water allowed the trout of the Lower Owens to grow to sizes we have not seen in a few years. Check out the shop instagram @stm_fly_fishing to see some recent impressive examples of recent trout from the river. As the sun warms the area in the mid-morning hours Mayflies can be seen floating on the water with some decent responses from the wild trout. This is not River wide and can be seen in one area with the bend around the corner not seeing any surface activity. As the river continues to reduce flows to more comfortable wading and fishing levels we could see one of the most amazing years to date on the Lower Owens River.

Call or text the STM Fly Shop in Bishop, California for more details or to book a guided tour. 760-873-0010

@stm_fly_fishing on instagram to see what the river and area offers

www.sierratroutmagnet.com

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