• Giant Sequoia Trees

    Sequoia & Kings Canyon

    National Parks California

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  • Sequoia and Kings Canyon National Parks Institute Stage 2 Fire Restrictions

    Effective July 28, 2014, the parks are in Stage 2 fire restrictions. See link below for more information. These restrictions will remain in place until further notice. More »

  • Road Construction Delays on Park Roads for 2014 Season

    Expect occasional 15-minute to 1-hour delays in Sequoia and Kings Canyon National Parks on weekdays only (times vary), including delays to/from the General Sherman Tree, Crystal Cave, and Grant Grove. More »

  • Vehicle Length Limits in Sequoia National Park (if Entering/Exiting Hwy 198)

    Planning to see the "Big Trees" in Sequoia National Park? If you enter/exit via Hwy. 198, and your vehicle is longer than 22 feet (combined length), please pay close attention to vehicle length advisories for your safety and the safety of others. More »

  • You May Have Trouble Calling Us

    We are experiencing technical problems receiving incoming phone calls. We apologize for the inconvenience. Please send us an email to SEKI_Interpretation@nps.gov or check the "More" link for trip-planning information. More »

Giant Sequoia Fire History in Mariposa Grove Abstract

Giant Sequoia Fire History in Mariposa Grove, Yosemite National Park. T.W. Swetnam, R. Touchan, C.H. Baisan, A.C. Caprio, and P.M. Brown. 1991. pp. 249-253. Yosemite Centennial Symposium Proceedings - A Global Issues Symposium Joining the 17th Annual Natural Areas Conferene with the Yosemite Centennial Celebration Oct. 13-20, 1990. 667 pp.

ABSTRACT - We reconstructed a 1,438-year history of wildfire in the Mariposa Grove of giant sequoia Sequoiadendron giganteum. Partial cross sections were taken from 18 dead fire-scarred trees, and tree rings and fire scars were dated. The resulting master fire chronology shows that fires recurred at intervals ranging from 1 to 15 years. Changes in fire frequency on time scales of centuries are also apparent. This fire history documents the long-term importance of fire in sequoia-mixed conifer ecosystems and illustrates the temporal variability of fire regimes.

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Did You Know?

The Four Guardsmen (four sequoias), with the Generals Highway running between them.

Sometimes you will see sequoias in a straight row. This may happen because sequoia seeds prefer mineral-rich burned ground. When a fallen log burns long and hot, it leaves a strip of bare mineral-rich soil — an ideal place for new sequoias to grow. Years later, we see a line of sequoias!