• 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 »


Become a Citizen Scientist!
Phenology is for all ages!

Phenology is for all ages!

What is phenology?

Have you ever taken notice when plants start to flower or birds begin to sing? The study of when these changes occur is called phenology. More specifically, phenology is the study of how changes in weather and climate affect the timing of plant and animal life cycle events. These seasonal life cycle events are called phenophases.

Why is phenology important?

Over the coming decades, scientists predict the climate of Sequoia-Kings Canyon National Parks will continue to become warmer. By monitoring the phases of plants, we hope to learn more about how a changing climate affects plants and the wildlife that depend on them. For example, hummingbirds and bees may be challenged to alter their typical feeding patterns and breeding behavior when spring flowers bloom earlier than usual.

How does the National Park Service contribute to phenological monitoring?

Sequoia National Park is part of the California Phenology Project (CPP) and monitors four plant species in the park. Data for each species is collected regularly and added to a national database maintained by the National Phenology Network (NPN). To learn about these species and where in the park they are monitored, click here.

Get involved!

As a citizen-scientist, you can help track changes in plant life where you live. We can help get you started by using phenology in your backyard, or in your classroom.

Did You Know?

Sequoia fire scar.

The large black areas at the base of many sequoia trees are fire scars. Even though fire may eat into the very heart of a sequoia tree, the tree can survive so long as the fire doesn't kill the living tissue all the way around the tree. Over time, the fire scars gradually heal over and disappear.