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The Boulder River near Big Timber and half way to Billings is running cold right now and mostly clear. The Boulder River is a viable option. Fishing is still good but requires a stealthier approach and a decent cast to get to fish before they see you. Nymphing smaller patterns can be productive but ice will become a persistent problem in the near future.
If you do fish the Boulder River right now lengthen your leader and drop down a few tippet sizes for the best success. Even though the fish on the Boulder River are not pressured, the water is low and clear and the fishing now is a lot more technical when compared to other rivers in the area and more technical than one would think right now. Be sure to read our latest blog post on how to choose the best leader for fishing for trout: Choose the Correct Leader and Catch More Fish.
The Month Ahead:
Wading anglers can fish this river and cover plenty of water, but have good wading boots and consider studs or cleats. The challenge on the Boulder River is the river bottom itself--it is called the Boulder River for reason because the make-up of the river bottom is large boulders and rocks. Fishing the Boulder River requires walking over, across, around, and up-and-over boulders of all sizes. Being in good physical condition and having quality wading gear are all important for success and safety on the Boulder River.