Imnaha River Steelhead Report

February 21, 2012
Penny

Key Takeaways

  • Imnaha River Steelhead conditions remain challenging due to low water levels around 150 cfs, making fishing success limited but still possible with patience and technique.

  • Optimal flow for Steelhead fishing on the Imnaha is between 300–400 cfs, which helps attract more fish and improves overall catch rates.

  • Fly choice and setup matter — a double nymph rig featuring a Copper John variation proved effective, while egg-style setups saw little action.

  • Persistence pays off, as Jon and Cam’s outing between Cow Creek and Horse Creek produced two hookups and one landed Steelhead despite tough conditions.



  • Anglers can expect future updates as fishing activity shifts toward the Wallowa River, offering a broader look at regional Steelhead runs.

 

Jon went down to fish the Imnaha over the weekend and had some success.  The Imnaha River is still very low holding around 150 cfs.  We would really like to see this get up between 3 and 400 to bring in more fish but it looks like there are at least 2 Steelhead in the Imnah right now.  Jon and Cam fished the Imnaha between Cow Creek and Horse Creek and hooked up 2 Steelhead landing 1.
The Imnaha can be tricky fishing in these low waters but it can be done. If you’re looking for a similar wilderness experience with a bit more flow, the Grande Ronde River offers excellent rafting and fishing opportunities. Jon had success with a double nymph rig.  Both Steelhead hooked up on his own rendition of a Copper John looking fly.  Jon is getting pretty good and coming up with some unique variations on a theme and having success with them.  Cam was fishing with more of an Alaskan egg setup and did not have any luck.

For anyone wanting to experience these rivers beyond fishing season, our guided white water rafting trips showcase the same beautiful stretches of water with professional guides and gear.

I hope to have a Steelhead report from the Wallowa River  this evening.  Stay tuned.

Frequently Asked Questions

Here are some common questions anglers have about steelhead fishing on the Imnaha River, especially during low-water conditions.

  • How is the steelhead fishing on the Imnaha River right now?

    Fishing is fair but challenging due to very low flows—around 150 cubic feet per second (cfs). Only a few steelhead have been spotted in the system, though a couple of hookups have been reported between Cow Creek and Horse Creek.


  • What water levels are ideal for steelhead fishing on the Imnaha River?

    Steelhead fishing improves significantly when flows rise to around 300–400 cfs. Higher water levels encourage more fish to move upriver, increasing chances of success for anglers.


  • What flies are working best for Imnaha River steelhead?

    A double nymph rig has proven successful, particularly flies resembling a Copper John pattern. Unique variations of this fly can attract steelhead effectively, even in low, clear conditions.


  • What other setups can be used for steelhead on the Imnaha?

    While nymph rigs are productive, some anglers try Alaskan-style egg setups. However, these are less effective in current low-flow conditions. Adjusting to smaller, more natural presentations often helps.


  • Where are anglers finding fish on the Imnaha River?

    Recent activity has been noted between Cow Creek and Horse Creek. These sections hold fish even in low water, though access and stealth are key to success.


  • How do low water conditions affect steelhead fishing?

    Low flows make fish more cautious and concentrated in deeper pools. Anglers need lighter lines, quieter approaches, and smaller flies to avoid spooking fish and improve hookups.


  • When can anglers expect better steelhead runs?

    Once river levels rise closer to 300–400 cfs, more fish should move into the Imnaha. Warmer weather or rain events often trigger these increases and improve fishing conditions.


  • What’s the outlook for nearby rivers like the Wallowa?

    A steelhead report from the Wallowa River is expected soon, which may offer better conditions depending on recent weather and flow changes. Stay tuned for updates on that system.