The Nonindigenous Occurrences section of the NAS species profiles has a new structure. The section is now dynamically updated from the NAS database to ensure that it contains the most current and accurate information. Occurrences are summarized in Table 1, alphabetically by state, with years of earliest and most recent observations, and the tally and names of drainages where the species was observed. The table contains hyperlinks to collections tables of specimens based on the states, years, and drainages selected. References to specimens that were not obtained through sighting reports and personal communications are found through the hyperlink in the Table 1 caption or through the individual specimens linked in the collections tables.

Oncorhynchus clarkii henshawi
Oncorhynchus clarkii henshawi
(Lahontan cutthroat trout)
Native Transplant

Copyright Info
Oncorhynchus clarkii henshawi (Gill and Jordan, 1878)

Common name: Lahontan cutthroat trout

Taxonomy: available through www.itis.govITIS logo

Native Range:
Hydrologic Unit Codes (HUCs) Explained
Interactive maps: Point Distribution Maps

Nonindigenous Occurrences:

Table 1. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Names and dates are hyperlinked to their relevant specimen records. The list of references for all nonindigenous occurrences of Oncorhynchus clarkii henshawi are found here.

StateFirst ObservedLast ObservedTotal HUCs with observations†HUCs with observations†
CA196219949California Region; San Joaquin; Surprise Valley; Upper Carson; Upper Mokelumne; Upper Pit; Upper San Joaquin; Upper Stanislaus; Upper Yuba
ID1988201114Beaver-Camas; Bruneau; C.J. Strike Reservoir; Lower Bear-Malad; Lower Boise; Lower North Fork Clearwater; Middle Bear; Pacific Northwest Region; Payette; Portneuf; Upper Henrys; Upper Owyhee; Upper Snake-Rock; Weiser
NV1873199911Diamond-Monitor Valleys; Dixie Valley; Guano; Hamlin-Snake Valleys; Long-Ruby Valleys; Lower Quinn; Northern Big Smoky Valley; Pine; Pyramid-Winnemucca Lakes; Reese; Salmon Falls
OR197519751Alvord Lake
WA196820036Banks Lake; Lower Crab; Methow; Okanogan; Pacific Northwest Region; Palouse
WY196119612Upper Laramie; Upper North Platte

Table last updated 2/25/2024

† Populations may not be currently present.

* HUCs are not listed for states where the observation(s) cannot be approximated to a HUC (e.g. state centroids or Canadian provinces).

References: (click for full references)

Tilmant, J.T. 1999. Management of nonindigenous aquatic fish in the U.S. National Park System. National Park Service. 50 pp.

Other Resources:
FishBase Summary

Revision Date: 4/15/2009

Peer Review Date: 4/15/2009

Citation Information:
U.S. Geological Survey, 2024, Oncorhynchus clarkii henshawi (Gill and Jordan, 1878): U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=894, Revision Date: 4/15/2009, Peer Review Date: 4/15/2009, Access Date: 2/25/2024

This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.


The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2024]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [2/25/2024].

Contact us if you are using data from this site for a publication to make sure the data are being used appropriately and for potential co-authorship if warranted.

For general information and questions about the database, contact Wesley Daniel. For problems and technical issues, contact Matthew Neilson.