Grand Gulf State Park | |
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![]() Water entering this cave reappears nine miles (14 km) away at Mammoth Spring. | |
Location | Oregon County, Missouri, United States |
Coordinates | 36°32′43″N 91°38′43″W / 36.54528°N 91.64528°W[1] |
Area | 321.96 acres (130.29 ha)[2] |
Elevation | 712 ft (217 m)[1] |
Established | 1984[3] |
Visitors | 57,524 (in 2022)[4] |
Governing body | Missouri Department of Natural Resources |
Website | Grand Gulf State Park |
Designated | June 1971 |
Grand Gulf State Park is a state-operated, privately owned and publicly accessible, geologic preserve near Thayer, Missouri, United States, encompassing a forked canyon that is the remnant of an ancient collapsed dolomite cave system.[5] The land that is now the park was acquired by conservationist Leo Drey (1917–2015) before becoming part of the Missouri state parks system. The 322-acre (130 ha) state park has been operated by the Missouri Department of Natural Resources under a lease agreement with the L-A-D Foundation since 1984.[6] Grand Gulf was declared a National Natural Landmark in 1971 as an excellent example of karst topography and underground stream piracy.[7] A 60-acre (24 ha) portion of the park was designated by the state as the Grand Gulf Natural Area in 1986.[8]
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