Fishing the Upper Owens River: Tips and Seasons

The longest river in the Eastern Sierra is also the most famous: the Owens. While folks have been fighting over the rights to the water for generations, people have been fishing here even longer.

The Upper Owens River

Just outside Mammoth Lakes, the Upper Owens River offers one of the most unique and rewarding fishing experiences in the region, and it’s a key part of the broader fishing in Mammoth Lakes landscape. In less than 30 minutes, you can go from town to standing along a quiet stretch of river, often with the chance to hook into surprisingly large trout.

As the largest tributary of Crowley Lake, the Upper Owens reaps all the rewards of being connected to one of the best stillwater fisheries in the West. During key seasons, fish move between the lake and the river, creating opportunities to catch larger, migratory trout.

For anglers looking to explore both environments, many will pair a day on the river with time spent fishing at Crowley Lake, where these fish originate and feed.

Known locally as the “Upper O,” this stretch is especially productive for:

Spring fishing: large rainbow trout during spawning runs
Fall fishing: aggressive brown trout returning upstream

Some of these fish grow so large they’ve earned the nickname “Sierra steelhead.”

A Different Kind of Sierra River

Unlike many high-alpine creeks in the region, the Upper Owens flows gently through a wide meadow in the Long Valley Caldera. It’s a spring-fed river that winds through open terrain, offering expansive views of the Sierra Nevada on one side and the Glass Mountains on the other.

In the spring and fall, the area also becomes a resting ground for migrating birds, adding to the overall experience.

Fishing Conditions and Accessibility

One of the biggest draws of the Upper Owens is how approachable it is.

The river is relatively narrow and easy to cast
Banks are mostly clear, with minimal brush
A dirt road runs alongside much of the river for easy access

This makes it a great option for beginners, families, or anyone new to fly fishing.

That said, the river still requires some awareness. The current can be strong, wading can be tricky in deeper sections, and the lack of cover means fish are quick to spot movement along the banks.

When to Fish the Upper Owens River

The Upper Owens is one of the few fisheries in Mono County that remains open year-round.

Spring and fall: peak seasons for large trout during spawning runs
Winter: catch-and-release fly fishing is especially popular
Summer: consistent fishing with fewer crowds in certain stretches

Each season offers a different experience, making it a reliable option no matter when you visit Mammoth Lakes.

Fishing Tips for the Upper Owens

The Upper Owens is often considered one of the more user-friendly fisheries in the region, but a bit of strategy goes a long way.

Walk beyond high-traffic access points for better results
Stay low and move carefully to avoid spooking fish
Try classic setups like “bacon and eggs” (worm + egg imitations)

While multiple techniques can work, understanding fish movement between Crowley Lake and the river can make a big difference.

Fishing Regulations

General season regulations apply from the last Saturday in April through November 15 across most of the river.

During the rest of the year, catch-and-release regulations are in place, with some stretches subject to special rules.

Always check with the California Department of Fish and Wildlife for the most up-to-date information before heading out.