Lahontan cutthroat trout (Oncorhynchus clarkii henshawi) is the only trout species native to Fallen Leaf Lake, Lake Tahoe and the Truckee River Basin but were extirpated by introduction of predatory non-native lake trout (Salvelinus namaycush), other competing non-native salmonids, and overfishing.
Lahontan cutthroat trout (Oncorhynchus clarkii henshawi) is the sole native trout species in Fallen Leaf Lake, Lake Tahoe, and the Truckee River Basin. However, they were eradicated due to the introduction of predatory non-native lake trout (Salvelinus namaycush), competing non-native salmonids, and overfishing.