State Route 90 (SR 90) was a short state highway in Nye County, Nevada. Its western terminus was in the ghost town of Rhyolite. It traveled east to its eastern terminus at SR 58 (now SR 374). The route was designated in 1960 as an unimproved road to connect to Rhyolite from SR 58. It became graded by 1969, and was removed from the state highway system in 1982.