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The climate is generally mild even at the cave's elevation of about 4,000 feet (1,200 m) above sea level, but icicles can form at the cave entrance, and winter snow sometimes blocks the park highway.
Oregon Caves National Monument and Preserve is a National Monument and Preserve in the northern Siskiyou Mountains of southwestern Oregon in the United States.
The main part of the 4,558-acre (1,845 ha) park, including the marble cave and a visitor center, is located 20 miles (32 km) east of Cave Junction, on Oregon Route 46.
A separate visitor center in Cave Junction occupies 4 acres (1.6 ha) of the total.
Both parts of the monument, managed by the National Park Service, are in southwestern Josephine County, near the Oregon–California border.
The popularity of the automobile, construction of paved highways, and promotion of tourism by boosters from Grants Pass led to large increases in cave visitation during the late 1920s and thereafter.
Among the attractions at the remote monument is the Oregon Caves Chateau, a six-story hotel built in a rustic style in 1934.
It is a National Historic Landmark and is part of the Oregon Caves Historic District within the monument.
The Park Service, which assumed control of the monument in 1933, offers tours of the cave from mid-April through early November.
In 2014, the monument was expanded by about 4,000 acres (1,600 ha) and re-designated a National Monument and Preserve.