A significant tributary to the Middle Fork Eel River in northern California.
- Fall Chinook Salmon [esa Listed]
- Coho Salmon [esa Listed]
- Resident Rainbow Trout
- Western Brook Lamprey
- Pacific Lamprey
Located in the Mendocino National Forest, the Black Butte River is a tributary to the Middle Fork of the Eel River from its headwaters near Round Mountain to the confluence just outside of Covelo, California.