How Scientists Brought the Legendary Lahontan Cutthroat Trout Back to Lake Tahoe
After nearly 90 years, Lahontan cutthroat trout have made a historic return to Lake Tahoe.
This milestone is part of a long-term effort led by the Nevada Department of Wildlife (NDOW) to restore this native species, which disappeared from the lake in 1938 due to overfishing, habitat destruction, and the introduction of non-native species.
In 2014, NDOW began studying non-native rainbow trout in Lake Tahoe to identify suitable spawning areas for the Lahontan cutthroat trout. Rainbow trout, which spawn in conditions similar to those Lahontans need, served as a model for biologists to determine where to reintroduce the native fish. Over the past several years, Lahontan cutthroat trout have been gradually reintroduced, with 100,000 fish stocked in Lake Tahoe this year alone.
Although hatchery-raised trout often struggle to thrive independently, ten Lahontan cutthroats returned to Third Creek this year and displayed natural spawning behavior—a significant breakthrough for the species.
To support a self-sustaining population, NDOW is developing “LCT refuge areas” in specific tributaries, where structures will help separate Lahontan cutthroats from rainbow trout to prevent hybridization. These refuge areas will give Lahontan cutthroat trout a protected environment to reproduce, preserving the species’ purity and increasing their chances of survival.
“This is a major success for Lahontan cutthroat recovery in Tahoe,” said Jason Barnes, a biologist with Trout Unlimited. “It’s not just about putting fish in a lake; it’s restoring a lost ecological function—fish returning to their native stream to spawn.”
NDOW hopes that the ten fish exhibiting spawning behavior will be the start of a self-sustaining population. With refuge areas in place and continued support from state and federal agencies, NDOW is optimistic that the lake’s native trout population can be restored, reviving a part of Tahoe’s natural heritage.
