The Painted Hills
The Painted Hills, a unit of the John Day Fossil Beds National Monument, get their name from the stratifications in the soil. The bands are from layers of silt, vegetative matter and more from the time this was an ancient river floodplain. The colored bands in the hills seem to change color with moisture levels and the angle of the sun overhead.
The hills are located about an hour east of Prineville, near Mitchell, Oregon