As mentioned any of the major streams or tirbs along the trunk road are good. I have caught cutts all the way from the Castle in the south to the Cardinal and Pembina north near Edson. The Elk at Fernie is great, my favorite remains the Crow, heading there now for three days. I find they are aggressive feeders, can be fussy at times and tend to like cloudy days. I usually prospect with a olive woolly bugger or stimulator if no real hatch is on. Reading the water and presentation is the key to success as I see it. Also see if TU is doing the Quirk Creek project, good place to get some cutt experience. Good luck.