The Utah monolith was a metal pillar that stood in a slot canyon in northern San Juan County, Utah, United States. The pillar was 9.5 ft (2.9 m) tall and made of metal sheets riveted into a triangular prism. It was unlawfully placed on public land between July and October 2016, where it stood unnoticed for over four years until its discovery and removal in late 2020. The identity of its creators and their objectives remain unknown as of 2026.