CHP Northern Division covers the following Northern California CHP Areas: Alturas, Clear Lake, Crescent City, Cottonwood Commercial Vehicle Enforcement Facility, Dunsmuir Grade Commercial Vehicle Enforcement Facility, Garberville, Humboldt, Mt. Shasta, Quincy, Red Bluff, Redding, Susanville, Trinity River, Ukiah, Williams, Willows, and Yreka.