The town of Thistle, Utah was established in 1883. It flourished for a time as a farming and ranching community, and became a major stop on the Denver and Rio Grande Western Railroad.
Then, in April of 1983, a massive landslide, the costliest in U.S. history, dammed two creeks, flooding and destroying most of the tiny town. Roofs became rafts, and can still be seen strewn about the area. Only a few structures remain and most can be seen from the road, including a red schoolhouse, a church on a hill, and a house half sunken into a bog.
From Salt Lake: Travel on I-15 towards the town of Spanish Fork. Take exit 261 and head east on U.S. Route 6/89. To view the landslide from the downstream side, turn right onto Spanish Fork River Park road after approximately 11 miles; otherwise, continue approximately 12.7 miles (from I-15) and turn right into the large pullout immediately before a massive double road cut.
This pullout provides an excellent overview of the area. Approximately 1.5 miles past the pullout, turn right onto U.S. Route 89 and travel approximately 1.5 miles to the ruins of the town of Thistle.