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English: The Cosumnes River — the last remaining free-flowing river in the Central Valley of California.
- Flowing from the central Sierra Nevada, through the northern San Joaquin Valley, to the Sacramento-San Joaquin Delta tidelands.
- The river, via its confluence into the Mokelumne River, is a tributary of the San Joaquin River.
- The Cosumnes River Preserve protects 46,000 acres (190 km2) of its wetland and Riparian woodland habitats.