How Disney’s Sierra Nevada ski resort changed environmentalism forever January 5, 2023 Home Explore The Naturalist's Journal How Disney’s Sierra Nevada ski resort changed environmentalism forever Share FacebookTwitterEmail Let’s start 2023 by looking six decades into the past. That’s how long it’s been since Walt Disney proposed building a massive ski resort at Mineral King, a gorgeous mountain valley in California’s Sierra Nevada bordered on three sides by Sequoia National Park.