Complex sentence: The area is characterized by deep, rough canyons, sharp rock ridges, and clear rushing mountain streams and rivers, including the headwater basins of the Chetco, North Fork Smith Rivers, as well as part of the Illinois River canyon.
Split into simpler sentences: The area is characterized by deep, rough canyons, sharp rock ridges, and clear, rushing mountain streams and rivers. The wilderness includes the headwater basins of the Chetco, North Fork Smith Rivers, as well as part of the Illinois River canyon.