Mt. Baker Ski Area is a ski resort in the northwest United States, located in Whatcom County, Washington, at the end of State Route 542. The base elevation is at 3,500 feet (1,067 m), while the peak of the resort is at 5,089 feet (1,551 m). It is about ten miles (16 km) south of the 49th parallel, the international border with Canada. Despite its name, the Mt. Baker Ski Area is actually closer to Mount Shuksan than Mount Baker.

State Route 542 (SR 542) is a 57.24-mile-long (92.12 km) state highway in the U.S. state of Washington, serving Mount Baker in Whatcom County. SR 542 travels east as the Mount Baker Highway from an interchange with Interstate 5 (I-5) in Bellingham through the Nooksack River valley to the Mt. Baker Ski Area at Austin Pass. It serves as the main highway to Mount Baker and the communities of Deming, Kendall, and Maple Falls along the Nooksack River. The highway was constructed in 1893 by Whatcom County as a wagon road between Bellingham and Maple Falls and was added to the state highway system as a branch of State Road 1 in 1925. The branch was transferred to Primary State Highway 1 (PSH 1) during its creation in 1937 and became SR 542 during the 1964 highway renumbering.