Hat Creek is an unincorporated town of 400 people in eastern Shasta County, California, 26 miles north of Lassen Park, 13 miles southeast of Burney (9 miles south of the junction of hwy 89 and 299), and 15 miles south of Burney Falls. Its zip code is 96040. Wired telephone numbers are from the Burney central office and follow the pattern 530-335-xxxx. Hat Creek is home to the Hat Creek Radio Observatory, run by UC Berkeley.