Tricos and hoppers are dominating the action on the Yellowstone. Look for fish rising to the Trico spinner fall mid-morning. Fish are in the tail-outs and slicks sipping the tiny mayflies. Early afternoon transitions right into hopper time! Nymphs and streamers are not producing very well, even in the early morning. It’s all about the dry! Try your favorite hopper pattern trailed by a size 16 Purple Haze for a searching rig. Use size 18-22 Trico spinner and parachute patterns when fishing to rising fish. Here are a few of the nice trout we’ve taken recently on the dry fly: