The Crooked River for January is in great shape, water level are good, there is not any partial ice cover now, and in the lower reaches of the canyon some good dry fly action with tiny dry midges and all over the river with small black Perdigons, Skinny Nelson, Scuds, Zebra and Midge Winkers and the smallest Flashback PT you can tie.
Approach the nymph game with a different plan for different water depths and types. Drop shot in the deeper runs with that little Black Perdi or Black Zebra 8 inches off the bottom, moving ever so slow as the split shot BELOW the flies rolls over the mossy rocks. Indicator it with a NZ wool or tiny Oros for strike detection that actually works in the winter when the fish taste the fly so softly in their lips. Euro nymph in the seams and runs,
Bring 6x and 7x tippet, the water is low and clear and you’ll do better with it than 5x.