In 1877, trout began entering Yosemite’s fish-free mountain lakes. More than a century later, a native frog is finally showing signs of recovery
For more than a century, Yosemite’s mountain lakes became home to millions of trout that had never naturally reached those waters. Fish stocking began in 1877 and eventually put more than 33 million fish into the park, transforming habitats that had evolved without aquatic predators. The change came at a cost for the Sierra Nevada…