• 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 »

Seasonal Position of Fire Scars

Graphic showing fire scar details of a annual tree ring

NPS graphic

This image (figure 2 from Caprio & Swetnam 1995) illustrates the potential position of fire scars within an annual growth ring. It shows specific areas of an annual ring used to designate intra-annual fire-scar positions. Through detailed examination of where a scar was formed within a ring the approximate season of past fire occurrence can often be determined. Understanding the tree-ring growth phenology in a particular area further enhances the interpretation of this information.

In the Sierra Nevada scars formed in the earlywood (EE to LE) indicate fire occurrence during early-to-mid summer (uncommon in the southern Sierra Nevada). Scars formed in the latewood (L) indicate fire occurrence during late summer while dormant season scars (D) indicate fires late in a year (latewood and dormant season scars are the most common in this region).

Did You Know?

Walter Fry in NPS uniform

After spending five days with five men cutting down a single sequoia, Walter Fry counted the growth rings on the fallen giant. The answer shocked him into changing careers. In just a few days they had ended 3266 years of growth. Fry later became a park ranger and, in 1912, the parks' superintendent.