DistributionRead full entry
Global Range: (20,000-200,000 square km (about 8000-80,000 square miles)) Historically this subspecies was abundant in lakes and streams throughout the physiographic Lahontan basin of northern Nevada, eastern California, and southern Oregon, including the Truckee, Carson, Walker, Susan, Humboldt, Quinn, Summit Lake/Black Rock Desert, and Coyote Lake watersheds (USFWS 2009). Large inhabited lakes included Lake Tahoe, Fallen Leaf Lake, and Cascade Lake in the Tahoe watershed; Donner Lake, Independence Lake, Winnemucca Lake (now dry), and Pyramid Lake in the Truckee River watershed; Walker Lake in the Walker River watershed; and Summit Lake in the Black Rock Desert watershed; other headwater lakes in the Walker River watershed were also historically occupied (Gerstung 1988).
Currently this subspecies exists in about 0.4% of its former lake habitat and approximately 9 percent of the former stream habitat within the native range; Independence and Summit lakes support the only remaining reproducing lacustrine form within the native range (USFWS 1994, 2009). The subspecies has been introduced outside the native range, primarily for recreational fishing purposes (USFWS 1994, 2009).