The deepest metro station in the United States is the Washington Park Station in Portland, Oregon. Part of the TriMet "MAX" light rail system, it is located 260 feet (79 meters) below ground level. It is the only completely underground station in the MAX system and was bored through the solid volcanic rock of the Tualatin Mountains (West Hills). To reach the platforms from the surface, passengers must use high-speed elevators that take approximately 30 seconds to descend. The station is so deep that the air temperature remains a constant 50°F (10°C) year-round, regardless of the weather outside. For comparison, the deepest station in the New York City Subway system is 191st Street on the 1 Train, which is 180 feet deep—still significantly shallower than Washington Park. In 2026, the station remains a marvel of American civil engineering, featuring a "geological timeline" display along its walls that showcases the various layers of rock and soil that were excavated during its construction in the late 1990s.