River habitat for winter-run chinook salmon has shrunk

Juvenile Chinook salmon born in the McCloud River once migrated downstream, into the Sacramento River and out to the Pacific Ocean. Today, about 80% of the salmon's historical river habitat is behind dams, which prevents the adult fish from swimming upstream to spawn. The state is mounting an experiment to return them to the McCloud River.

• Historical salmon habitat now blocked by a dam
• Current salmon habitat
• McCloud River watershed