Warm Springs (Immigrants Washtub)
Warm Springs, historically known as Immigrants Washtub, flows at 70°F on National Guard Maneuver Training Center land at Camp Guernsey in Platte County, creating a thermal feature 20 degrees above ambient temperature. Located 911 meters from the nearest road at 4,438 feet elevation, the spring sits on military property managed by the Department of Defense with no public access. The historical name references pioneer use along the Oregon Trail.
The spring emerges in the North Platte River valley at 4,438 feet elevation, where average annual temperatures reach 50°F with only 14 inches of precipitation and 35 inches of snow. The surrounding landscape consists of mixed grassland and sagebrush typical of Wyoming's eastern plains, transitioning to riparian vegetation along the North Platte River corridor. Camp Guernsey's military training area encompasses thousands of acres of semiarid high plains used for mechanized maneuver exercises. The spring lies roughly half a mile from access roads within the installation.
The name Immigrants Washtub directly references emigrant use during the mid-1800s Oregon Trail migration. Pioneers traveling the nearby trail used this warm spring for washing clothes and bathing, a welcome amenity after weeks on the dusty trail. The spring became a documented stop along the emigrant route, with period journals and letters mentioning the washing spring near the Platte. The site was later incorporated into Camp Guernsey, a Wyoming National Guard training facility established in the early 20th century.
The spring is closed to public access on active military training land. No visiting is permitted without Department of Defense authorization. The site holds historical significance as an Oregon Trail landmark, though its military status precludes casual tourism. Researchers seeking access must coordinate through Camp Guernsey Public Affairs Office. The spring's historical context can be appreciated at nearby Oregon Trail interpretive sites in Guernsey, including the famous Oregon Trail ruts.