The Toutle River is a 17.2-mile tributary of the Cowlitz River in the state of Washington. It rises in two forks merging near Toutle below Mount St. Helens and joins the Cowlitz near Castle Rock, 20 miles upstream of the larger river's confluence with the Columbia River.
- Fall Chinook Salmon [esa Listed]
- Winter Steelhead [esa-listed]
- Resident Rainbow Trout
- Coastal Cutthroat Trout
- Pacific Lamprey