The Illinois River is a tributary, about 56 miles long, of the Rogue River in the U.S. state of Oregon. It drains part of the Klamath Mountains in northern California and southwestern Oregon. The river's main stem begins at the confluence of its east and west forks near Cave Junction in southern Josephine County. Its drainage basin includes Sucker Cree…
The Illinois River is a tributary, about 56 miles long, of the Rogue River in the U.S. state of Oregon. It drains part of the Klamath Mountains in northern California and southwestern Oregon. The river's main stem begins at the confluence of its east and west forks near Cave Junction in southern Josephine County. Its drainage basin includes Sucker Creek, which rises in the Red Buttes Wilderness, near Whiskey Peak on the California state line. The main stem flows generally northwest in a winding course past Kerby and through the Siskiyou National Forest and Kalmiopsis Wilderness. It joins the Rogue River from the south at Agness 4.75 miles NW of the Curry–Josephine county line, and 27 miles from the Pacific Ocean, 16.8 miles as the crow flies.
Etymology: The U.S. state of Illinois, the birthplace of three brothers named Althouse who emigrated to Oregon and mined for gold along Althouse Creek and the Illinois River
Country: United States
State: Oregon
County: Josephine and Curry
Source: Confluence of East Fork Illinois River and West Fork Illinois River
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