Lahontan cutthroat trout
Large native trout of the Lahontan Basin in Nevada and surrounding states.
The Lahontan cutthroat trout is a distinct species of Pacific trout native to cold-water tributaries in Nevada, Oregon, and California. It includes the giant form from Pyramid Lake, which can reach record sizes. Reclassified as a separate species in 2023, it faces threats from habitat loss and non-native fish.
- Reclassified as a distinct species in 2023
- Record weight of 41 lb caught in Pyramid Lake
- Native to the Lahontan Basin in Nevada
- Tolerates higher salinity than other cutthroats
- Extirpated from Lake Tahoe by mid-20th century
What it is
The Lahontan cutthroat trout is a member of the Pacific trout group within the salmon family. It gets its common name from the red slash found under its lower jaw. This fish displays medium-sized round spots across its body and head. It has more gill rakers than other cutthroat types. The species includes both smaller river forms and large lake-dwelling variants. The giant form from Pyramid Lake is particularly notable for its size.
Where it lives
This trout lives in the Lahontan hydrographic basin. Its range covers most of northern Nevada and extends into southeastern Oregon and northeastern California. Key areas include the Truckee, Carson, and Walker River basins. Remnant lakes such as Pyramid, Walker, and Summit are important habitats. The eastern basin includes the Humboldt and Reese Rivers. In Oregon, it is found in Willow and Whitehorse Creeks.
How it lives
Most populations follow a river-based life cycle, though strategies vary by location. Fish in small streams move short distances, while lake populations migrate further. Large lake trout act as predators, feeding on suckers and chubs. They eat insects, crayfish, and molluscs when young. Beaver ponds provide refuge during droughts. The fish tolerates higher temperatures and salinity better than related species.
Breeding and life cycle
Large lake populations historically spawned in tributary streams. Young fish reared in the river environment before returning to the lake to mature. Dam construction disrupted these migration routes. High-elevation populations may mature later due to shorter growing seasons. Spawning timing depends on stream flow and temperature conditions.
Fish and people
Anglers prize this trout, especially for fly fishing. Historically, commercial fisheries harvested large numbers for restaurants. The discovery of the Comstock Lode led to deforestation and sedimentation that harmed spawning beds. Dams blocked access to cooling waters. Non-native species like rainbow trout were introduced, competing with the native stock. The population in Lake Tahoe was lost by the mid-20th century.
Status and threats
Habitat degradation, overfishing, and dams caused significant declines. Non-native species outcompete them and pose hybridization risks. Whirling disease affects stressed populations. Climate change threatens to warm waters and alter flow regimes. Wildfires and fragmentation add to these pressures. Conservation efforts focus on restoring access to spawning habitats.
Questions people ask about Lahontan cutthroat trout
Where does the Lahontan cutthroat trout live?
It is native to the Lahontan Basin, covering northern Nevada, southeastern Oregon, and northeastern California. It inhabits cold-water tributaries, streams, and terminal lakes like Pyramid and Walker Lake.
How large can this trout grow?
The giant lacustrine form can reach up to 1 meter in length. A record specimen from Pyramid Lake weighed 18.6 kg, with reports of even larger fish.
Why did it disappear from Lake Tahoe?
Overfishing, logging-induced sedimentation, and dam construction blocked spawning routes. Non-native species introduction further depleted the population by the mid-20th century.
What does it eat?
Young fish eat macroinvertebrates and insects. Large lake forms become piscivorous, feeding on endemic fish like the Cui-ui lakesucker and Tui chub.
Good reading and sources
- Lahontan cutthroat trout on WikipediaEncyclopedia
- More photos on Wikimedia CommonsPhotos
- Wikidata recordOpen data
The facts on this page come from the Wikipedia article "Lahontan cutthroat trout", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). EveryFish rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes, and figures change over time. Nothing here is investment or buying advice. If something is wrong, tell us. Last refreshed 2026-11-15.
Like Lahontan cutthroat trout
All salmon and trout
🇺🇸 United States and 3 moreKokanee salmon
A landlocked freshwater form of the sockeye salmon found in North America and Japan.Salmonid · Rivers and lakes
🇺🇸 United StatesApache trout
A golden-spotted trout native to Arizona highlands.Salmonid · Rivers and lakes
🇷🇺 Russia and 1 moreBaikal black grayling
A Siberian freshwater salmonid found in Lake Baikal and surrounding river systems.Salmonid · Rivers and lakes
🇬🇧 United Kingdom and 3 moreSea trout
Anadromous form of brown trout that migrates between sea and rivers.Salmonid · Between sea and river
More from Salmonidae
All of them
🇬🇧 United KingdomSchelly
Rare whitefish of the English Lake DistrictSalmonid · Rivers and lakes
🇺🇸 United StatesCisco
Small salmonid fish of northern lakes and seasSalmonid · Rivers and lakes
WorldTaimen
Large freshwater salmonids native to EurasiaSalmonid · Rivers and lakes
🇷🇺 RussiaInconnu
A large anadromous whitefish native to the Caspian Sea basin.Salmonid · Rivers and lakes