NatureBridge, formerly Yosemite Institute and later Yosemite National Institutes, is an American nonprofit organization founded in 1971 that provides environmental education through field studies.

[3][4] Its lessons include hiking, laboratory-style experiments, and excursions in the backcountry.

[6] Its founding was inspired by a student trip to Yosemite led by high school teacher Don Rees in the same year.

[6] In 1973 Yosemite Institute acquired a special use permit for a blister rust facility in Crane Flat, which it used for longer than was envisioned.

[4] In August 2020, the organization was forced to terminate 21 already-furloughed employees and shut down its Seattle office due to the COVID-19 pandemic.