The Yellowstone cutthroat trout, Oncorhynchus clarkii bouvieri, is a popular sport fish that is native to parts of Utah, Wyoming, Idaho, Montana, and Nevada. It is now found in many areas outside of its native range, however, because it has been extensively stocked by fish and wildlife agencies throughout the western United States for nearly 100 years. In Utah, the Yellowstone cutthroat is native to the Snake River drainage of the northwestern corner of the state (see the accompanying map), but is established in many other areas.
The Yellowstone cutthroat trout is not as extensively stocked in Utah as it was previously. Instead, the Utah Division of Wildlife Resources is now focusing a great deal of effort on restoring two sensitive cutthroat races, the Bonneville cutthroat trout and the Colorado River cutthroat trout, to their respective native ranges in the state.
Like other cutthroat races, the Yellowstone cutthroat is an opportunistic feeder, with the diet of small individuals dominated by invertebrates, and the diet larger individuals composed primarily of fish. Spawning occurs in stream riffles during the spring and early summer.