Mitchell Caverns encompasses three limestone caves — El Pakiva and Tecopa, which are connected by a man-made tunnel, and a third cave in the system. Limestone caves form through a process that requires both the right rock type and the right water chemistry: slightly acidic groundwater dissolves limestone over millions of years, carving voids that grow as the dissolution continues. The caves in the Providence Mountains are the only limestone caves within the California State Park system.

At 4,300 feet, the caves sit well above the desert floor — in the transition zone between the Mojave Desert below and the upper elevation plant communities that the Providence Mountains support. The elevation means cooler temperatures inside the caves year-round, a feature that both the Mitchells and the Chemehuevi before them would have appreciated during desert summers.

Jack Mitchell was not a professional tour operator when he arrived in the Providence Mountains. He was a man who found something remarkable and understood that other people would want to see it. He spent two years improving access and developing the infrastructure needed to run tours before opening to visitors in 1934. He and Ida managed the caves as a private attraction until 1954, when they sold to the state of California.

For those twenty years, the Mitchells ran a legitimate tourist business in one of the more remote locations along the Route 66 corridor — getting visitors up the mountain road, through the caves, and safely back to the highway. The clientele were the same people who stopped at Roy's in Amboy, who gassed up in Ludlow, who were crossing the desert by car in the era before air conditioning made it comfortable. The caves were a respite: cool, dark, and startling in their geological detail.

Paleontologists working in the caves found remains of the Shasta ground sloth — an extinct Pleistocene mammal that stood several feet tall and fed on desert vegetation during the ice age. The sloth's presence confirms that the caves served as shelter for large mammals during periods when the Mojave Desert was wetter and more biologically productive than it is today.

The Shasta ground sloth went extinct approximately 11,000 years ago, at roughly the same time as the megafauna extinction that eliminated most large mammals from the Americas. The causes remain debated — climate change, human hunting pressure, or some combination — but the remains in Mitchell Caverns provide a physical record of the animal's presence in this specific corner of California. The caves that tourists walk through today were once a den.

California's budget crisis led to Mitchell Caverns closing in January 2011 — one of numerous state park closures during a period of fiscal contraction. The closure lasted until November 3, 2017, when the caverns reopened under a concession arrangement that restored guided tours. The closure had lasted long enough to alarm visitors and historians who feared the site might remain shuttered permanently.

The Providence Mountains State Recreation Area, which encompasses the caverns, offers the only developed camping and facilities in the eastern Mojave between Barstow and Needles along the Interstate 40 corridor. The elevation that makes the caves cool in summer makes the area pleasant in spring and fall, when the desert floor is either too hot or too cold for comfortable camping. At 7,162 feet, Edgar Peak above the caverns offers views across the Mojave that extend on clear days to mountain ranges in Arizona and Nevada.