Lehman Caves

Enter Nevada's longest cave system through illuminated limestone chambers where crystalline shield formations and glittering speleothems fill the underground passages. Shield formations—thin, blocky mineral deposits—build up where mineral-rich water seeps through ceiling and wall fissures, a visible record of ongoing geological work still happening today. Access is exclusively through daily ranger-led tours, with expert guides explaining the cave's mineralogy and million-year development across maintained underground pathways. Tours operate year-round except Thanksgiving, Christmas, and New Year's Day; reservations through recreation.gov are essential as tours regularly sell out.