Simplify the following text for a Grade 7 native English-speaking person.
Original: Feather Falls is a waterfall located on the Fall River , a tributary of the Middle Fork Feather River , within the Plumas National Forest in the Sierra Nevada ; in Butte County , eastern California .
Simplified: Feather Falls is a waterfall found on the Fall River . It is a tributary of the Middle Fork Feather River , in Plumas National Forest of Butte County , California .