• Giant Sequoia Trees

    Sequoia & Kings Canyon

    National Parks California

There are park alerts in effect.
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  • 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 »

Air Quality -- Visibility

Park views are often obscured, most frequently in the summer. Contributions of air pollutants from vehicle emissions, agricultural activities, prescribed and wildland fire, and other sources of fine particles limit the visitor experience in these parks.

A good way to learn more about air quality problems in our national parks is to view the network of National Park Service webcams. The website also provides a wealth of data on air quality over time.

Go to the Giant Forest Webcam page > > >
 
Two views of the valley below the parks, one with a thick gray blanket of pollution hiding the foothills, the other with clear air showing several ranges of foothills
Bad visibility from the western edge of Giant Forest in Sequoia National Park, looking west toward the San Joaquin Valley and the Coast Range. To the right is the same view on a day with good air quality.
NPS Photos

Did You Know?

Mineral crystals compared to size of a penny.

Most of the distinctive light-colored rock characteristic of the Sierra Nevada is a granitic rock called granodiorite. A huge formation of this rock, called a batholith, lies within the Sierra. Some 400 miles long and up to 50 miles wide, the Sierra batholith is one of the largest in North America. More...