Castle Rock, Washington

Arkansas Creek is a stream in the U.S. state of Washington.Arkansas Creek was named after the state of Arkansas, the native home of a large share of the first settlers.

Castle Rock High School is a rural public high school in Castle Rock, Washington.

KLYK (94.5 FM) is a radio station broadcasting an Adult Top 40 format. Licensed to Kelso, Washington, United States, the station is currently owned by Bicoastal Media Licenses IV, LLC and features programming from Premiere Networks and Westwood One. The station focuses on Today's Best Music with the slogan "Southwest Washington's Hit Music Channel."

Sandy Bend is an unincorporated community in Cowlitz County, Washington, south of the city of Castle Rock, west of Washington State Route 411, and to the west of the Cowlitz River. Sandy Bend is located along or near Sandy Bend Road between Castle Rock and West Side Highway. The Sandy Bend community is part of the Castle Rock School District, a K-12 school district of about 1,300 students.

The Toutle River is a 17.2-mile (27.7 km) tributary of the Cowlitz River in the U.S. state of Washington. It rises in two forks merging near Toutle below Mount St. Helens and joins the Cowlitz near Castle Rock, 20 miles (32 km) upstream of the larger river's confluence with the Columbia River.The river was altered by the 1980 eruption of Mount St. Helens, a nearby volcano, and subsequent flows of ash and other debris. It was further altered by dredging to remove sediment, and by construction of the Toutle River Sediment Retention Structure on the North Fork Toutle River.

The Cowlitz Formation is a geologic formation in Washington (state). It preserves fossils dating back to the Paleogene period

Pleasant Hill is an unincorporated community in Cowlitz County, Washington, south of the city of Castle Rock. Pleasant Hill is located along or near Pleasant Hill Road between Castle Rock and Ostrander. The northern end of Pleasant Hill community is part of the Castle Rock School District, while the southern end is part of the Kelso School District.

The Laughlin Round Barn near Castle Rock, Washington is a round barn that was built in 1883. It was listed on the National Register of Historic Places in 1986.

Ostrander is an unincorporated community in Cowlitz County, Washington, north of the city of Kelso. Ostrander is located north on North Pacific Avenue from exit 42 of Interstate 5. The Ostrander community is part of the Kelso School District, a K-12 school district of nearly 5,000 students.

Lexington is an unincorporated community and census-designated place (CDP) in Cowlitz County, Washington, United States. As of the 2020 census, it had a population of 3,834. During the 2010 census, Lexington was part of the West Side Highway CDP. The CDP is in the western part of the county and is bordered to the southwest by Beacon Hill and to the east by the Cowlitz River. State Route 411 runs through the community, following the Cowlitz. It leads south 4 miles (6 km) to Longview and north 8 miles (13 km) to Castle Rock.

West Side Highway was a census-designated place (CDP) in Cowlitz County, Washington, named after a state highway (SR 411) running north–south between Longview and Castle Rock. As of the 2010 census, the CDP population was 5,517. Prior to the 2020 census, the CDP was split into two new CDPs, Beacon Hill and Lexington.

Seaquest State Park is a public recreation area located on the western flank of Silver Lake in Cowlitz County, Washington. The 505-acre (204 ha) state park is home to the Mount St. Helens Visitor Center, which offers displays on the Mount St. Helens volcanic eruption of 1980. Mount St. Helens itself is 30 miles (48 km) east of the park.