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FishNet 2
USGS NAS| HUC Code | Watershed Name | Occurrence | Source |
| 18010201 | Willamson | Current | NatureServe |
| 18010202 | Sprague | Current | NatureServe |
| 18010203 | Upper Klamath Lake | Current | NatureServe |
| 18010204 | Lost | Current | NatureServe |
| 18010205 | Butte | Current | NatureServe |
| 18010206 | Upper Klamath | Current | NatureServe |
| 18010207 | Shasta | Current | NatureServe |
| 18010208 | Scott | Current | NatureServe |
| 18010209 | Lower Klamath | Current | NatureServe |
| 18010210 | Salmon | Current | NatureServe |
| 18010211 | Trinity | Current | NatureServe |
| 18020003 | Lower Pit | Current | NatureServe |