Utah Cutthroat Slam, Yellowstone Cutthroat Trout. March 20, 2017 creek Cutthroat trout +4 cutthroattrout fishing flyfishing trout Utah Utah cutthroat slam Yellowstone Yellowstonecutthroat Yellowstonecutthroattrout creek Cutthroat trout cutthroattrout fishing flyfishing trout Utah Utah cutthroat slam Yellowstone Yellowstonecutthroat Yellowstonecutthroattrout