Sego Canyon, Utah, is just west of the Colorado border along U.S. Route 70. During the early twentieth century, a coal-mining town sprang up in the area. When the mining operation failed, the boomtown went bust. Thousands of years before, Indigenous people painted and carved images onto the canyon walls. Those ghostly forms are still on display today, provocative, mysterious, and enduring reminders of the people who lived here long ago. Rock art on the walls of Sego Canyon was created over the centuries by three distinct tribal groups who…