Main city: Castle Rock
Timezone: Pacific
Phone type: Landline
Operator: Qwest Corporation

Castle Rock, a city in Cowlitz County, Washington, United States. Nestled between the Willapa Hills and western base of Mount St. Helens, Castle Rock is at the heart of Washington timber country in the Pacific temperate rain forest. Castle Rock is part of the 'Longview, Washington Metropolitan Statistical Area'; the population was 1,982 as of the 2010 census. ^source

Area code 360 is the telephone area code for western Washington state outside of metropolitan Seattle. It began service on January 15, 1995. The area, which encompasses all of western Washington outside of urban King, Pierce, and Snohomish counties and Bainbridge Island, was previously part of area code 206. Area codes 360 and 334 (Alabama), which began service on the same day, were the first two area codes in the North American Numbering Plan with a middle digit other than 0 or 1. ^source