Timpanogos Cave National Monument is a cave system in the Wasatch Mountains in American Fork Canyon near American Fork, Utah, in the United States. The 1.5 mile trail to the cave is steep at several points, but paved and wide, so the cave opening is accessible to most. Tours are run when the monument is open, usually from May through October depending on snow conditions.
There are three main chambers accessible in the tour: Hansen Cave, Middle Cave, and Timpanogos Cave. Many colorful cave features or speleothems can be seen. Among the most interesting are the helictites, which are like hollowed straws of rock. They are thought to be formed when water travels through the tube and then evaporates, leaving a small mineral deposit at the end. Other speleothems found in the cave include: cave bacon, cave columns, flowstone, cave popcorn, cave drapery, helictites, stalactites and stalagmites.
Middle Cave and Timpanogos Cave were discovered in an era where their formations and resources could be protected. The National Park Service, which oversees and preserves the cave complex, has continued to develop new ways to retain its natural features, including limiting lighting in the caves to retard growth of invasive organisms.