Crooked is kind of slow. Is it worth a try? Sure. It was pretty iced up but that has subsided. Do you know how to do a drop shot nymph rig? Look it up. When the water is cold, low and slow is a great way to present the fly. Our guide Mary Ann is really good at this and uses the technique all year on the Crooked.
Zebra Midges, Thread Midges, Midge Winklers, Copper John, Skinny Nelson, Micro Mayfly, Scuds.
I’ll tell you every once in a while in the winter a larger Prince Nymph (#12’ish) can be the fly that takes a slow day to a decent one.
One other thing, look for rising trout to midge pupa and midge adults farther down from the dam, like around mile post 12 late afternoon.