Independence Rock

60 mi. SW of Casper on WY 220, Casper, Wyoming. County/parish: Natrona.

NRIS 66000757

1 contributing site.

Added to the National Register of Historic Places October 15, 1966.

From Wikipedia:

Independence Rock (Wyoming)

Independence Rock is a large granite rock, approximately 130 feet (40 m) high, 1,900 feet (580 m) long, and 850 feet (260 m) wide, which is in southwestern Natrona County, Wyoming along Wyoming Highway 220. During the middle of the 19th century, it formed a prominent and well-known landmark on the Oregon, Mormon, and California emigrant trails. Many of these emigrants carved their names on it, and it was described by early missionary and explorer Father Pierre-Jean De Smet in 1840 as the Register of the Desert. The site was designated a National Historic Landmark on January 20, 1961 and is now part of Independence Rock State Historic Site, owned and operated by the state of Wyoming.

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National Park Service documentation: