• Wizard Island

    Crater Lake

    National Park Oregon

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  • Vehicle-Free Days on East Rim Drive

    The park will host two vehicle-free days on East Rim Drive, September 20 and 27, 2014. Although East Rim Drive will be closed for these events, all other roads through the park will remain open to vehicular traffic. More »

  • Lost Creek Campground CLOSED Nights of 9/19 and 9/26

    Lost Creek Campground will be CLOSED from 3:00 PM Friday, 9/19 until 5:00 PM Saturday, 9/20 because of the temporary road closure to vehicles on East Rim Drive. It will also be CLOSED from 3:00 PM Friday, 9/26 until 5:00 PM Saturday, 9/27.

  • Stage 1 Fire Restrictions in Effect

    To ensure public safety and to provide the highest degree of protection to park resources, restrictions on campfires, smoking, and fireworks are in effect. More »

Research Equipment Used in Crater Lake


A CTD sensor package.


The CTD Profiler is a continuous water quality sensor that is lowered from the boat to the lake bottom at 580 meters. The CTD measures water temperature, depth, salinity, particle density, and chlorophyll concentration.

secchi disk

A Secchi Disk in Crater Lake.


The Secchi Disk is a flat plate that is lowered into the water column from a boat. The secchi disk is used world-wide as a quick and reliable indicator of the clarity of a lake.

van dorn out of water

A Van Dorn water sampler being lowered into Crater Lake.


The Van Dorn is a water sampler that is lowered into Crater Lake. Multiple Van Dorns collect water samples from eleven depths during July, August, and September.

sediment trap on boat

A sediment trap being readied for sampling in Crater Lake.


A sediment trap has collected falling particles in Crater Lake for thirty years. The sediment trap was last used during the summer of 2013.

weather buoy

The weather buoy at Crater Lake.


A floating weather station has been collecting information since 1992.

Did You Know?

Did You Know?

The Clarks Nutcracker is frequently seen around the rim of Crater Lake. It feeds almost exclusively on the seeds of the Whitebark Pine. It gathers the seeds and hides some of them to eat later, helping the tree to disperse its seeds. Forgotten seeds may grow into new Whitebark Pines.