These flies are very successful on the Provo River, Green River, Weber River, Logan River, Duchesne River, Strawberry River, Currant Creek, Blacksmith Fork, East Fork of Sevier, Bear River, Price River, White River, Yellowstone River, Jones Hole Creek, Henry's Fork, Blacks Fork, Dolores River, Cub River, Ogden River, East Canyon Creek, Cottonwood Creek, Emigration Creek, Big Cottonwood Creek, Little Cottonwood Creek, Sevier River, Beaver River, San Pitch River