![]() Looking forward: Threats to Yellowstone cutthroat trout come from several fronts and often act together in making streams and lakes less suitable for Yellowstone cutthroat trout. Yellowstone cutthroat trout are locally adapted to the waters in which they evolved, so populations vary in timing of their spawning runs, the habitat they select, and the factors that cue their spawning. ![]() Yellowstone cutthroat trout are spring spawners and spawn from May through July. In streams and rivers, Yellowstone cutthroat trout have habitat similar requirements to most trout, but they are more sensitive to habitat damage, warmer water temperatures, and sedimentation than nonnative trout. ![]() Yellowstone Lake, at 90,000 acres, was by far the largest lake available to Yellowstone cutthroat trout. This distribution included large parts of Wyoming, Montana, Idaho, with a few streams supporting Yellowstone cutthroat trout extending into small portions of Utah and Nevada. Historically, or pre-European settlement, Yellowstone cutthroat trout were present in an estimated 17,800 miles of stream. Yellowstone cutthroat trout are native to the Yellowstone and Snake River watersheds, a distribution that crosses the Continental Divide. State and federal agencies assign Yellowstone cutthroat trout special status as “species of concern” or “sensitive species”. Yellowstone cutthroat trout have disappeared from a substantial portion of their historical range and are less abundant in some waters they still occupy. This stunning fish lives alongside Yellowstone cutthroat trout in the Snake River drainage. The fine-spotted cutthroat trout is another form of Yellowstone cutthroat trout, and as the name suggests, a dense distribution of small spots covers its flanks. Yellowstone cutthroat trout tend to be golden brown with relatively large, dark spots concentrated towards the tail. Species summary and Ssatus: The Yellowstone cutthroat trout occupies waters in Wyoming, Idaho, Montana, Utah, and Nevada. Yellowstone cutthroat trout (Oncorhynchus clarkii bouvieri) Sign Up for Auto-Renewal & Sustainer Giving.
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