Natrona County

Natrona County is an administrative county in central Wyoming that encompasses several notable landmarks, including Casper Mountain, Devil's Gate, and Independence Rock within its borders. The region features diverse terrain with mountains, rivers, and geological formations that shape its overall character.

The county was established in 1888 by the Wyoming Territory legislature and named after natron mineral deposits found throughout the area. This founding marked a turning point in the administrative organization of the expanding region.

The land was long home to the Cheyenne, Arapaho, Shoshone, and Sioux peoples, whose legacy remains visible in place names and local stories passed down through generations. Visitors can encounter traces of these cultures at several sites throughout the region.

The region is served by Casper Regional Airport for access, with several smaller airfields offering additional entry points. Roads connect the main towns and attractions, though having a vehicle is helpful for exploring the expansive terrain.

Hell's Half Acre is a geological depression spanning roughly 320 acres with unusual rock formations shaped by erosion over many centuries. This natural wonder draws visitors who want to see how water and time have carved the land.

Location: Wyoming

Inception: 1888

Capital city: Casper

Shares border with: Johnson County, Converse County, Carbon County, Fremont County, Washakie County

Website: http://natronacounty-wy.gov

GPS coordinates: 42.97000,-106.80000

Latest update: December 20, 2025 12:04