Big Kimshew Creek is a stream in Butte county northern California. It originates in the Lassen National Forest of the Sierra Nevada Mountains and flows some in a generally south-southwesterly direction to join the West Branch Feather River, a tributary of the Feather River, a major northern California river system.
The creek is known for its whitewater rapids and waterfalls. Its discharge fluctuates dramatically between spring, when it carries snowmelt, and autumn, ranging from .
The creek rises in a meadow 1 mile (1.6 km) northwest of Table Mountain in the southern extreme of the national forest. It flows south into a gorge, receiving Keyser Creek from the right, and Little Kimshew Creek from the left shortly after. At the Little Kimshew confluence it turns west, then again southwest, through a valley over deep. It is joined by Little Rock Creek just above the confluence with the West Branch Feather River. The creek's mouth is situated about south of Stirling City.