Brown Trout - Salmo truttaExotic Fish
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FishNet 2 
USGS NAS| HUC Code | Watershed Name | Occurrence | Source |
| 01040001 | Upper Androscoggin | Current | USGS NAS |
| 01050002 | Maine Coastal | Current | USGS NAS |
| 01060002 | Saco | Current | USGS NAS |
| 01060003 | Piscataqua-Salmon Falls | Current | USGS NAS |
| 01070001 | Pemigewasset | Current | USGS NAS |
| 01070002 | Merrimack | Current | USGS NAS |
| 01070003 | Contoocook | Current | USGS NAS |
| 01070004 | Nashua | Current | USGS NAS |
| 01070005 | Concord | Current | USGS NAS |
| 01080101 | Upper Connecticut | Current | USGS NAS |
| 01080102 | Passumpsic | Current | USGS NAS |
| 01080103 | Waits | Current | USGS NAS |
| 01080104 | Upper Connecticut-Mascoma | Current | USGS NAS |
| 01080105 | White | Current | USGS NAS |
| 01080106 | Black-Ottauquechee | Current | USGS NAS |
| 01080107 | West | Current | USGS NAS |
| 01080201 | Middle Connecticut | Current | USGS NAS |
| 01080202 | Miller | Current | USGS NAS |
| 01080203 | Deerfield | Current | USGS NAS |
| 01080204 | Chicopee | Current | USGS NAS |
| 01080205 | Lower Connecticut | Current | USGS NAS |
| 01080206 | Westfield | Current | USGS NAS |
| 01080207 | Farmington | Current | USGS NAS |
| 01090001 | Charles | Current | USGS NAS |
| 01090002 | Cape Cod | Current | USGS NAS |
| 01100001 | Quinebaug | Current | USGS NAS |
| 01100003 | Thames | Current | USGS NAS |
| 01100005 | Housatonic | Current | USGS NAS |
| 01110000 | St. Francois | Current | USGS NAS |
| 02010001 | Lake George | Current | USGS NAS |
| 02010002 | Otter | Current | USGS NAS |
| 02010003 | Winooski | Current | USGS NAS |
| 02010005 | Lamoille | Current | USGS NAS |
| 02010007 | Missiquoi | Current | USGS NAS |
| 02020003 | Hudson-Hoosic | Current | USGS NAS |
| 02020006 | Middle Hudson | Current | USGS NAS |
| 02040104 | Middle Delaware-Mongaup-Brodhead | Current | USGS NAS |
| 02040205 | Brandywine-Christina | Current | USGS NAS |
| 02050101 | Upper Susquehanna | Current | USGS NAS |
| 02050102 | Chenango | Current | USGS NAS |
| 02050103 | Owego-Wappasening | Current | USGS NAS |
| 02050104 | Tioga | Current | USGS NAS |
| 02050105 | Chemung | Current | USGS NAS |
| 02050106 | Upper Susquehanna-Tunkhannock | Current | USGS NAS |
| 02050107 | Upper Susquehanna-Lackawanna | Current | USGS NAS |
| 02050201 | Upper West Branch Susquehanna | Current | USGS NAS |
| 02050202 | Sinnemahoning | Current | USGS NAS |
| 02050203 | Middle West Branch Susquehanna | Current | USGS NAS |
| 02050204 | Bald Eagle | Current | USGS NAS |
| 02050205 | Pine | Current | USGS NAS |
| 02050206 | Lower West Branch Susquehanna | Current | USGS NAS |
| 02050301 | Lower Susquehanna-Penns | Current | USGS NAS |
| 02050302 | Upper Juniata | Current | USGS NAS |
| 02050303 | Raystown | Current | USGS NAS |
| 02050304 | Lower Juniata | Current | USGS NAS |
| 02050305 | Lower Susquehanna-Swatara | Current | USGS NAS |
| 02050306 | Lower Susquehanna | Current | USGS NAS |
| 02070008 | Middle Potomac-Catoctin | Current | USGS NAS |
| 02070010 | Middle Potomac-Anacostia-Occoquan | Current | USGS NAS |
| 02080103 | Rapidan-Upper Rappahannock | Current | USGS NAS |
| 02080201 | Upper James | Current | USGS NAS |
| 02080202 | Maury | Current | USGS NAS |
| 02080203 | Middle James-Buffalo | Current | USGS NAS |
| 02080204 | Rivanna | Current | USGS NAS |
| 03010101 | Upper Roanoke | Current | USGS NAS |
| 03010103 | Upper Dan | Current | USGS NAS |
| 03040101 | Upper Yadkin | Current | USGS NAS |
| 03040201 | Lower Pee Dee | Current | USGS NAS |
| 03050105 | Upper Broad | Current | USGS NAS |
| 03050109 | Saluda | Current | USGS NAS |
| 03050112 | Santee | Current | USGS NAS |
| 03050201 | Cooper | Current | USGS NAS |
| 03060101 | Seneca | Current | USGS NAS |
| 03060102 | Tugaloo | Current | USGS NAS |
| 03060103 | Upper Savannah | Current | USGS NAS |
| 03130001 | Upper Chattahoochee | Current | USGS NAS |
| 03150104 | Etowah | Current | USGS NAS |
| 03150105 | Upper Coosa | Current | USGS NAS |
| 03150106 | Middle Coosa | Current | USGS NAS |
| 04010201 | St. Louis | Current | USGS NAS |
| 04010301 | Beartrap-Nemadji | Current | USGS NAS |
| 04020201 | Betsy-Chocolay | Current | USGS NAS |
| 04020300 | Lake Superior | Current | USGS NAS |
| 04030101 | Manitowoc-Sheboygan | Current | USGS NAS |
| 04030104 | Oconto | Current | USGS NAS |
| 04030105 | Peshitgo | Current | USGS NAS |
| 04030108 | Menominee | Current | USGS NAS |
| 04030201 | Upper Fox | Current | USGS NAS |
| 04030202 | Wolf | Current | USGS NAS |
| 04040001 | Little Calumet-Galien | Current | USGS NAS |
| 04040002 | Pike-Root | Current | USGS NAS |
| 04040003 | Milwaukee | Current | USGS NAS |
| 04060101 | Pere Marquette-White | Current | USGS NAS |
| 04060104 | Betsie-Platte | Current | USGS NAS |
| 04060200 | Lake Michigan | Current | USGS NAS |
| 04080300 | Lake Huron | Current | USGS NAS |
| 04090002 | Lake St. Clair | Current | USGS NAS |
| 04120101 | Chautauqua-Conneaut | Current | USGS NAS |
| 04120200 | Lake Erie | Current | USGS NAS |
| 04130002 | Upper Genesee | Current | USGS NAS |
| 04130003 | Lower Genesee | Current | USGS NAS |
| 04150200 | Lake Ontario | Current | USGS NAS |
| 04150301 | Upper St. Lawrence | Current | USGS NAS |
| 05010001 | Upper Allegheny | Current | USGS NAS |
| 05020005 | Lower Monongahela | Current | USGS NAS |
| 05020006 | Youghiogheny | Current | USGS NAS |
| 05030203 | Little Kanawha | Current | USGS NAS |
| 05050002 | Middle New | Current | USGS NAS |
| 05050006 | Upper Kanawha | Current | USGS NAS |
| 05070202 | Upper Levisa | Current | USGS NAS |
| 05080002 | Lower Great Miami | Current | USGS NAS |
| 05110001 | Upper Green | Current | USGS NAS |
| 05130103 | Upper Cumberland-Lake Cumberland | Current | USGS NAS |
| 05130104 | South Fork Cumberland | Current | USGS NAS |
| 05130105 | Obey | Current | USGS NAS |
| 05130108 | Caney | Current | USGS NAS |
| 05130201 | Lower Cumberland-Old Hickory Lake | Current | USGS NAS |
| 06010101 | North Fork Holston | Current | USGS NAS |
| 06010102 | South Fork Holston | Current | USGS NAS |
| 06010103 | Watauga | Current | USGS NAS |
| 06010204 | Lower Little Tennessee | Current | USGS NAS |
| 06010205 | Upper Clinch | Current | USGS NAS |
| 06010206 | Powell | Current | USGS NAS |
| 06020001 | Middle Tennessee-Chickamauga | Current | USGS NAS |
| 07020007 | Middle Minnesota | Current | USGS NAS |
| 07030005 | Lower St. Croix | Current | USGS NAS |
| 07040001 | Rush-Vermillion | Current | USGS NAS |
| 07040003 | Buffalo-Whitewater | Current | USGS NAS |
| 07040005 | Trempealeau | Current | USGS NAS |
| 07040006 | La Crosse-Pine | Current | USGS NAS |
| 07040007 | Black | Current | USGS NAS |
| 07050001 | Upper Chippewa | Current | USGS NAS |
| 07060001 | Coon-Yellow | Current | USGS NAS |
| 07060003 | Grant-Little Maquoketa | Current | USGS NAS |
| 07060005 | Apple-Plum | Current | USGS NAS |
| 07070003 | Castle Rock | Current | USGS NAS |
| 07080102 | Upper Wapsipinicon | Current | USGS NAS |
| 07080209 | Lower Iowa | Current | USGS NAS |
| 07090005 | Lower Rock | Current | USGS NAS |
| 07120006 | Upper Fox | Current | USGS NAS |
| 07120007 | Lower Fox | Current | USGS NAS |
| 10020001 | Red Rock | Current | USGS NAS |
| 10020002 | Beaverhead | Current | USGS NAS |
| 10020003 | Ruby | Current | USGS NAS |
| 10020004 | Big Hole | Current | USGS NAS |
| 10020005 | Jefferson | Current | USGS NAS |
| 10020006 | Boulder | Current | USGS NAS |
| 10020007 | Madison | Current | USGS NAS |
| 10020008 | Gallatin | Current | USGS NAS |
| 10030101 | Upper Missouri | Current | USGS NAS |
| 10030102 | Upper Missouri-Dearborn | Current | USGS NAS |
| 10030103 | Smith | Current | USGS NAS |
| 10030104 | Sun | Current | USGS NAS |
| 10030105 | Belt | Current | USGS NAS |
| 10030203 | Marias | Current | USGS NAS |
| 10030205 | Teton | Current | USGS NAS |
| 10040101 | Bullwhacker-Dog | Current | USGS NAS |
| 10040103 | Judith | Current | USGS NAS |
| 10040104 | Fort Peck Reservoir | Current | USGS NAS |
| 10040201 | Upper Musselshell | Current | USGS NAS |
| 10040205 | Lower Musselshell | Current | USGS NAS |
| 10050004 | Middle Milk | Current | USGS NAS |
| 10050012 | Lower Milk | Current | USGS NAS |
| 10060001 | Prairie Elk-Wolf | Current | USGS NAS |
| 10070001 | Yellowstone Headwaters | Current | USGS NAS |
| 10070002 | Upper Yellowstone | Current | USGS NAS |
| 10070003 | Shields | Current | USGS NAS |
| 10070004 | Upper Yellowstone-Lake Basin | Current | USGS NAS |
| 10070005 | Stillwater | Current | USGS NAS |
| 10070006 | Clarks Fork Yellowstone | Current | USGS NAS |
| 10070007 | Upper Yellowstone-Pompeys Pillar | Current | USGS NAS |
| 10080010 | Big Horn Lake | Current | USGS NAS |
| 10080015 | Lower Bighorn | Current | USGS NAS |
| 10090101 | Upper Tongue | Current | USGS NAS |
| 10100001 | Lower Yellowstone-Sunday | Current | USGS NAS |
| 10100004 | Lower Yellowstone | Current | USGS NAS |
| 10120108 | Hat | Current | USGS NAS |
| 10120109 | Middle Cheyenne-Spring | Current | USGS NAS |
| 10120110 | Rapid | Current | USGS NAS |
| 10120111 | Middle Cheyenne-Elk | Current | USGS NAS |
| 10130302 | South Fork Grand | Current | USGS NAS |
| 10140201 | Upper White | Current | USGS NAS |
| 10140203 | Little White | Current | USGS NAS |
| 10150002 | Niobrara Headwaters | Current | USGS NAS |
| 10150003 | Upper Niobrara | Current | USGS NAS |
| 10150004 | Middle Niobrara | Current | USGS NAS |
| 10150005 | Snake | Current | USGS NAS |
| 10150007 | Lower Niobrara | Current | USGS NAS |
| 10170101 | Lewis and Clark Lake | Current | USGS NAS |
| 10180002 | Upper North Platte | Current | USGS NAS |
| 10180009 | Middle North Platte-Scotts Bluff | Current | USGS NAS |
| 10180010 | Upper Laramie | Current | USGS NAS |
| 10180012 | Horse | Current | USGS NAS |
| 10180014 | Lower North Platte | Current | USGS NAS |
| 10190001 | South Platte Headwater | Current | USGS NAS |
| 10190002 | Upper Southe Platte | Current | USGS NAS |
| 10190003 | Middle South Platte-Cherry Creek | Current | USGS NAS |
| 10190004 | Clear | Current | USGS NAS |
| 10190005 | St. Vrain | Current | USGS NAS |
| 10190006 | Big Thompson | Current | USGS NAS |
| 10190007 | Cache La Poudre | Current | USGS NAS |
| 10190015 | Upper Lodgepole | Current | USGS NAS |
| 10200101 | Middle Platte-Buffalo | Current | USGS NAS |
| 10210002 | Dismal | Current | USGS NAS |
| 10210008 | Calamus | Current | USGS NAS |
| 10220001 | Upper Elkhorn | Current | USGS NAS |
| 10250016 | Middle Republican | Current | USGS NAS |
| 11010001 | Beaver Reservoir | Current | USGS NAS |
| 11010003 | Bull Shoals Lake | Current | USGS NAS |
| 11010004 | Middle White | Current | USGS NAS |
| 11010006 | North Fork White | Current | USGS NAS |
| 11010010 | Spring | Current | USGS NAS |
| 11010014 | Little Red | Current | USGS NAS |
| 11020001 | Arkansas Headwaters | Current | USGS NAS |
| 11020002 | Upper Arkansas | Current | USGS NAS |
| 11020003 | Fountain | Current | USGS NAS |
| 11020006 | Huerfano | Current | USGS NAS |
| 11020010 | Purgatorie | Current | USGS NAS |
| 11110203 | Lake Conway-Point Remove | Current | USGS NAS |
| 13010001 | Rio Grande Headwaters | Current | USGS NAS |
| 13010002 | Alamosa-Trinchera | Current | USGS NAS |
| 13010003 | San Luis | Current | USGS NAS |
| 13010005 | Conejos | Current | USGS NAS |
| 14010001 | Colorado Headwaters | Current | USGS NAS |
| 14010002 | Blue | Current | USGS NAS |
| 14010004 | Roaring Fork | Current | USGS NAS |
| 14020001 | East-Taylor | Current | USGS NAS |
| 14020002 | Upper Gunnison | Current | USGS NAS |
| 14020003 | Tomichi | Current | USGS NAS |
| 14020005 | Lower Gunnison | Current | USGS NAS |
| 14020006 | Uncompahange | Current | USGS NAS |
| 14030001 | Westwater Canyon | Current | USGS NAS |
| 14030003 | San Miguel | Current | USGS NAS |
| 14030005 | Upper Colorado-Kane Springs | Current | USGS NAS |
| 14040101 | Upper Green | Current | USGS NAS |
| 14040102 | New Fork | Current | USGS NAS |
| 14040103 | Upper Green-Slate | Current | USGS NAS |
| 14040104 | Big Sandy | Current | USGS NAS |
| 14040106 | Upper Green-Flaming Gorge Reservoir | Current | USGS NAS |
| 14050002 | Lower Yampa | Current | USGS NAS |
| 14050007 | Lower White | Current | USGS NAS |
| 14060001 | Lower Green-Diamond | Current | USGS NAS |
| 14060002 | Ashley-Brush | Current | USGS NAS |
| 14060003 | Duchesne | Current | USGS NAS |
| 14060004 | Strawberry | Current | USGS NAS |
| 14060008 | Lower Green | Current | USGS NAS |
| 14060009 | San Rafael | Current | USGS NAS |
| 14070001 | Upper Lake Powell | Current | USGS NAS |
| 14070003 | Fremont | Current | USGS NAS |
| 14070005 | Escalante | Current | USGS NAS |
| 14070006 | Lower Lake Powell | Current | USGS NAS |
| 14070007 | Paria | Current | USGS NAS |
| 14080101 | Upper San Juan | Current | USGS NAS |
| 14080105 | Middle San Juan | Current | USGS NAS |
| 15010001 | Lower Colorado-Marble Canyon | Current | USGS NAS |
| 15010008 | Upper Virgin | Current | USGS NAS |
| 15010011 | White | Current | USGS NAS |
| 15010013 | Meadow Valley Wash | Current | USGS NAS |
| 15020001 | Little Colorado Headwaters | Current | USGS NAS |
| 15020005 | Silver | Current | USGS NAS |
| 15020008 | Middle Little Colorado | Current | USGS NAS |
| 15020010 | Chevelon Canyon | Current | USGS NAS |
| 15020016 | Lower Little Colorado | Current | USGS NAS |
| 15040004 | San Francisco | Current | USGS NAS |
| 15040005 | Upper Gila-San Carlos Reservoir | Current | USGS NAS |
| 15050302 | Rillito | Current | USGS NAS |
| 15060102 | White | Current | USGS NAS |
| 15060103 | Upper Salt | Current | USGS NAS |
| 15060105 | Tonto | Current | USGS NAS |
| 15060202 | Upper Verde | Current | USGS NAS |
| 15060203 | Lower Verde | Current | USGS NAS |
| 16010203 | Little Bear-Logan | Current | USGS NAS |
| 16010204 | Lower Bear-Malad | Current | USGS NAS |
| 16020101 | Upper Weber | Current | USGS NAS |
| 16020102 | Lower Weber | Current | USGS NAS |
| 16020201 | Utah Lake | Current | USGS NAS |
| 16020202 | Spanish Fork | Current | USGS NAS |
| 16020203 | Provo | Current | USGS NAS |
| 16020204 | Jordan | Current | USGS NAS |
| 16020301 | Hamlin-Snake Valleys | Current | USGS NAS |
| 16020307 | Pilot-Thousand Springs | Current | USGS NAS |
| 16030001 | Upper Sevier | Current | USGS NAS |
| 16030002 | East Fork Sevier | Current | USGS NAS |
| 16030003 | Middle Sevier | Current | USGS NAS |
| 16030005 | Lower Sevier | Current | USGS NAS |
| 16030007 | Beaver Bottoms-Upper Beaver | Current | USGS NAS |
| 16040107 | Reese | Current | USGS NAS |
| 16040203 | Smoke Creek Desert | Current | USGS NAS |
| 16040205 | Thousand-Virgin | Current | USGS NAS |
| 16050101 | Lake Tahoe | Current | USGS NAS |
| 16050102 | Truckee | Current | USGS NAS |
| 16050301 | East Walker | Current | USGS NAS |
| 16050302 | West Walker | Current | USGS NAS |
| 16060002 | Gabbs Valley | Current | USGS NAS |
| 16060004 | Northern Big Smoky Valley | Current | USGS NAS |
| 16060005 | Diamond-Monitor Valleys | Current | USGS NAS |
| 16060007 | Long-Ruby Valleys | Current | USGS NAS |
| 16060008 | Spring-Steptoe Valleys | Current | USGS NAS |
| 16060010 | Fish Lake-Soda Spring Valleys | Current | USGS NAS |
| 17010102 | Fisher | Current | USGS NAS |
| 17010201 | Upper Clark Fork | Current | USGS NAS |
| 17010202 | Flint-Rock | Current | USGS NAS |
| 17010203 | Blackfoot | Current | USGS NAS |
| 17010204 | Middle Clark Fork | Current | USGS NAS |
| 17010205 | Bitterroot | Current | USGS NAS |
| 17010208 | Flathead Lake | Current | USGS NAS |
| 17010213 | Lower Clark Fork | Current | USGS NAS |
| 17010214 | Pend Oreille Lake | Current | USGS NAS |
| 17010215 | Priest | Current | USGS NAS |
| 17010216 | Pend Oreille | Current | USGS NAS |
| 17010305 | Upper Spokane | Current | USGS NAS |
| 17010307 | Lower Spokane | Current | USGS NAS |
| 17020001 | Franklin D. Roosevelt Lake | Current | USGS NAS |
| 17020003 | Colville | Current | USGS NAS |
| 17020005 | Chief Joseph | Current | USGS NAS |
| 17020013 | Upper Crab | Current | USGS NAS |
| 17020015 | Lower Crab | Current | USGS NAS |
| 17030002 | Naches | Current | USGS NAS |
| 17040104 | Palisades | Current | USGS NAS |
| 17040202 | Upper Henrys | Current | USGS NAS |
| 17040205 | Willow | Current | USGS NAS |
| 17040208 | Portneuf | Current | USGS NAS |
| 17040212 | Upper Snake-Rock | Current | USGS NAS |
| 17040213 | Salmon Falls | Current | USGS NAS |
| 17040214 | Beaver-Camas | Current | USGS NAS |
| 17040219 | Big Wood | Current | USGS NAS |
| 17040221 | Little Wood | Current | USGS NAS |
| 17050111 | North and Middle Forks Boise | Current | USGS NAS |
| 17050112 | Boise-Mores | Current | USGS NAS |
| 17050116 | Upper Malheur | Current | USGS NAS |
| 17050123 | North Fork Payette | Current | USGS NAS |
| 17060107 | Lower Snake-Tucannon | Current | USGS NAS |
| 17060108 | Palouse | Current | USGS NAS |
| 17060303 | Lochsa | Current | USGS NAS |
| 17070102 | Walla Walla | Current | USGS NAS |
| 17070105 | Middle Columbia-Hood | Current | USGS NAS |
| 17090012 | Lower Willamette | Current | USGS NAS |
| 17110005 | Upper Skagit | Current | USGS NAS |
| 18010206 | Upper Klamath | Current | USGS NAS |
| 18010208 | Scott | Current | USGS NAS |
| 18010210 | Salmon | Current | USGS NAS |
| 18010211 | Trinity | Current | USGS NAS |
| 18020002 | Upper Pit | Current | USGS NAS |
| 18020004 | McCloud | Current | USGS NAS |
| 18020106 | Lower Feather | Current | USGS NAS |
| 18020112 | Sacramento-Upper Clear | Current | USGS NAS |
| 18020116 | Upper Cache | Current | USGS NAS |
| 18020119 | Mill-Big Chico | Current | USGS NAS |
| 18020121 | North Fork Feather | Current | USGS NAS |
| 18020122 | East Branch North Fork Feather | Current | USGS NAS |
| 18020123 | Middle Fork Feather | Current | USGS NAS |
| 18020125 | Upper Yuba | Current | USGS NAS |
| 18020128 | North Fork American | Current | USGS NAS |
| 18020129 | South Fork American | Current | USGS NAS |
| 18030007 | Upper Kaweah | Current | USGS NAS |
| 18030010 | Upper King | Current | USGS NAS |
| 18040001 | Middle San Joaquin-Lower Chowchilla | Current | USGS NAS |
| 18070102 | Santa Clara | Current | USGS NAS |
| 18070203 | Santa Ana | Current | USGS NAS |
| 18080001 | Suprise Valley | Current | USGS NAS |
| 18090102 | Crowley Lake | Current | USGS NAS |
| 18090103 | Owens Lake | Current | USGS NAS |
| 18090208 | Mojave | Current | USGS NAS |
Citation:
FishMap.org. 2025. Brown Trout - Salmo trutta. Available online at http://fishmap.org/species/Brown-Trout-.html - last accessed November 5, 2025.
FishMap.org. 2025. Brown Trout - Salmo trutta. Available online at http://fishmap.org/species/Brown-Trout-.html - last accessed November 5, 2025.
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Change Log
- 02/05/2024 10:01:04
Fixed issue with GBIF data being returned in eventDate field.
- 11/20/2018 11:35:34
Added iDigBio.org collection data to species maps.
- 11/15/2018 15:19:23
Added GBIF.org collection data to species maps.
- 09/20/2018 21:25:13
Started caching Fish Net 2 data. Hopefully this helps with some of the performance issues and loads.
- 09/14/2017 11:15:00
Fixed an issue preventing users from submitting records. Sorry for the inconvience! Please try again.
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