Simplify the following text for a Grade 8 native English-speaking person.
Original: Chico sits on the Sacramento Valley floor close to the foothills of the Cascade range and the Sierra Nevada range with Little Chico Creek being the demarcation line between the Cascade range ( North of Little Chico Creek ) and the Sierra Nevada range ( South of Little Chico Creek ) .
Simplified: Chico is in the Sacramento Valley close to the foothills of the Sierra Nevada mountain range .