Est. 1883 · Most costly landslide in U.S. history · Denver and Rio Grande Western Railroad history · Utah County disaster history
The town of Thistle took root in the 1880s as a service stop for the Denver and Rio Grande Western Railroad, which passed through the narrow canyon of the Spanish Fork River in what is now southeastern Utah County. The railroad was the town's reason for being, and Thistle at its peak held around 600 residents, a schoolhouse, commercial buildings, and the infrastructure typical of a mountain railroad junction.
By 1983 the population had fallen to roughly 22 occupied homes. In the spring of that year, an unusually wet and snowy winter had saturated the canyon slopes above and below the town. On April 13, 1983, a complex earthflow — a slow, continuous slump of waterlogged soil and rock — began moving across the canyon floor. By April 16, the Denver and Rio Grande Western tracks were buried. Voluntary evacuation orders went out the same day.
Within days, the earthflow had completely dammed the Spanish Fork River. Water backed up rapidly. By May, nearly 65,000 acre-feet had accumulated behind the natural dam, creating a lake approximately three miles long and up to 200 feet deep. The floodwaters submerged Thistle. US Routes 6 and 89 through the canyon closed for eight months.
The U.S. Army Corps of Engineers drilled a diversion tunnel through the mountain to drain the lake and eventually stabilized the slide. Direct damages were estimated at $200 million, with some estimates reaching $400 million accounting for secondary economic impacts, making it the costliest landslide event in U.S. history. The Denver and Rio Grande Western reported $80 million in lost revenue alone. No residents of Thistle died in the disaster — all were evacuated before the flooding. The town was never rebuilt.
The ruins remain today. A partially standing schoolhouse, a half-sunken house, and scattered foundations are visible from a pullout along US-89. The California Zephyr passes the site on what was rebuilt as the Rio Grande right-of-way.
Sources
- https://en.wikipedia.org/wiki/Thistle,_Utah
- https://www.atlasobscura.com/places/thistle-ghost-town
- https://geology.utah.gov/map-pub/survey-notes/geosights/thistle-landslide/
- https://www.intermountainhistories.org/items/show/34
No ghosts are reported at Thistle. The town was evacuated before the floodwaters arrived, and no one died in the disaster itself. What draws visitors is the observable physical record: foundations, a schoolhouse wall, and a house listing in the boggy soil, all visible from US-89 in the canyon. The California Zephyr passes close enough that Amtrak passengers sometimes photograph the ruins without stopping.
The site documents what a rapid, complete evacuation looks like when the emergency allows time — residents left with what they could carry, but the buildings stayed. The combination of industrial ruin, high alpine setting, and the sudden scale of the flood has given Thistle a place in Utah dark tourism that does not require a ghost story.
