The San Joaquin pocket mouse carries seeds in fur-lined cheek pouches. It searches for food on the ground at night and stays in a burrow by day.
Its silky coat has pale to pinkish dorsal fur mixed with blackish-brown hairs. The underside is white, with orange markings around the eyes.
It mainly searches for seeds on the ground at night and carries them in fur-lined cheek pouches. It rests in a burrow by day and also eats insects and other small invertebrates.
An extinction-risk assessment has not been added yet.