Each year, Yosemite’s three giant sequoia groves — Merced, Tuolumne and Mariposa — draw thousands of visitors who marvel at the iconic big trees. While the Mariposa Grove is the largest and most well-known, the Merced and Tuolumne groves both support their own diverse habitats and are in need of restoration.

In 2013, intensive surveys were conducted to fill information gaps for all three groves. Park scientists mapped and measured giant sequoias to analyze their current status and health. Wildlife was observed to determine how different species use the groves’ habitat, while fire history was analyzed to determine current status and risk.

Environmental-education students also helped gather critical information about giant sequoias in Yosemite. With basic information about the status of these groves, better management decisions can be made, bringing the sequoia groves back into ecological balance.

Partnering with Yosemite National Park, Jack L. Boyd Outdoor School and NatureBridge.


Bill Kuhn

Vegetation Ecologist

Project Notes

The majestic giant sequoia have stood watch over the changing landscape of Yosemite for millenia.