From talus slopes to wetlands, waterfall spray zones and old-growth forests, Yosemite’s more than 748,000 acres cover a huge variety of habitats. Those protected ecosystems are rich with life but can be vulnerable to human activity. Hikers inadvertently trample fragile plants. Backpackers accidentally transport invasive seeds. Infrastructure disrupts natural water flow. Your support helps reverse those impacts, allows flora and fauna to thrive, and protects wild places for future generations.