The Lahontan cutthroat is the largest cutthroat trout in the world, and it is native to this river. A 41-pound world record came out of Pyramid Lake in 1925, and railcars of iced fish shipped to San Francisco. Then Derby Dam blocked the spawning runs, the fishery collapsed, and by the early 1940s the giant strain was declared extinct.
In 1977 a biologist found its descendants surviving in a desert creek a person can step across, on Pilot Peak at the Nevada–Utah line. Eggs reached the Lahontan hatchery in 1995; DNA from century-old museum specimens confirmed the match; and in 2006 the strain came home to Pyramid Lake with the Pyramid Lake Paiute Tribe.

The rarer cousin is closer to home. The Paiute cutthroat's entire native range is eleven miles of Silver King Creek, upstream of the resort in the Carson-Iceberg Wilderness. A Basque herder carrying surplus fish over a waterfall around 1912 saved the pure strain by accident; on September 18, 2019, biologists carried its descendants back down by mule, returning the fish to its historic range for the first time in about a century.
The comeback ends in the water in front of the cabins: the Lahontan cutthroat stocked in the East Fork today are raised from the Heenan Lake broodstock, six miles up the Monitor Pass road.




