Take the Eiffel Tower, stack the Washington Monument on top of it, then balance the Statue of Liberty on the very top. Lower the whole pile into the deepest point of Crater Lake and 100 feet of water would still cover Lady Liberty’s torch. That is the National Park Service’s own comparison, and it is the right way to meet a lake that plunges 1,943 feet into the wreckage of a volcano that destroyed itself 7,700 years ago.
What follows are 14 verified facts about Crater Lake National Park, the mountain that fell in on itself to make it, and the people who have been telling its story ever since. For trip planning, lodging, and trails, start with our full Crater Lake National Park guide.
Tony Pattiz taught American history for more than 25 years before he began writing it for this site. More Than Just Parks has not yet filmed at Crater Lake, so nothing below leans on our cameras. It leans on the primary record instead, the park’s own histories, USGS volcanology, and the research files listed at the end of this article. Every date, number, and name has been checked against those sources. Last verified July 2026.
Crater Lake National Park Basics
- Location: Southern Oregon, on the crest of the Cascade Range, about 100 miles east of the Pacific Ocean
- Size: 183,224 acres, per the NPS Geodiversity Atlas
- Lake depth: 1,943 feet, the deepest lake in the United States, per the 2000 sonar survey
- Lake surface: About 21 square miles, a little over 6 miles at its widest point
- Visitation: 632,242 recreation visits in 2025, per NPS Stats
- Highest point: Mount Scott, 8,929 feet, the park’s oldest peak as well
- Established: May 22, 1902
1. Crater Lake Is The Deepest Lake In The United States
The number that defines this park was first chased with a lead pipe and piano wire. In 1886, a U.S. Geological Survey party lowered that primitive sounding rig at 168 spots around the lake and concluded the deepest point sat 1,996 feet down. When scientists mapped the bottom with multibeam sonar in 2000, the official figure came in at 1,943 feet. The Victorians with the piano wire had been off by less than 3 percent.
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That depth makes Crater Lake the deepest lake in the United States and, by the Park Service’s own reckoning, the ninth deepest in the world. Only Canada’s Great Slave Lake beats it in North America. And since none of the eight lakes above it on the NPS list formed in a volcano, the Park Service adds one more superlative. Crater Lake is the deepest volcanic lake in the world.
2. The Lake Sits Inside A Volcano That Collapsed 7,700 Years Ago
There is no crater at Crater Lake. What the rim actually encloses is a caldera, the hole left behind when a 12,000 foot volcano called Mount Mazama emptied its magma chamber and fell in on itself about 7,700 years ago. The USGS reports that the climactic eruption sent pyroclastic flows as far as 43 miles down every valley off the mountain and dropped ash across much of the Pacific Northwest and parts of southern Canada.
Mazama was no overnight sensation. The USGS traces its volcanic activity back roughly 420,000 years, and the story did not end with the collapse either. Lava kept erupting inside the caldera even as rain and snow began filling it, and the agency still assigns the volcano a very high threat potential today. The mountain is sleeping, not gone.
3. The Klamath People Have Remembered The Eruption For 7,700 Years
How long can human memory hold an event? Archaeologists have found sandals and other artifacts buried under the ash, dust, and pumice of Mazama’s eruption, proof that people were in the region when the mountain fell. And accounts of the eruption survive in the stories of the Klamath people, descendants of the Makalak people who lived southeast of the present park.
In the Makalak account retold in the park’s own film, Llao, Chief of the Below World, stood atop Mazama and hurled fire at the people, and Skell, Chief of the Above World, fought him from the summit of Mount Shasta until the mountain collapsed on Llao. Rain filled the hole that remained. The legend preserves, in story form, exactly what the geology says happened.
The lake itself was held sacred, and the Makalaks believed that looking upon it could lead to death. That reverence is why the first white settlers heard nothing about it, and why some Native Americans still choose not to view the lake today.
4. A Hunt For A Lost Gold Mine Put The Lake On The Record In 1853
In the spring of 1853, eleven miners from Yreka, California stopped for supplies in Jacksonville, Oregon and bragged that they could find the legendary Lost Cabin gold mine. The storekeeper, Isaac Skeeters, quietly assembled ten Oregonians to chase the same prize, bankrolled by John Wesley Hillman, a 21 year old just back from the California goldfields.
They never found gold. On June 12, three members of the party rode up to the rim of a huge depression holding a vast body of water. Hillman declared it the bluest water he had ever seen, and Skeeters suggested the name Deep Blue Lake. Then provisions ran short, the party went home, and with no gold attached to the story, Jacksonville forgot the discovery almost immediately.
5. The Lake Went Through Four Names In Sixteen Years
Because Hillman’s find was forgotten, the lake kept getting discovered. In 1862, a party of prospectors led by Chauncy Nye came upon it and named it Blue Lake, and Nye’s short article in the Jacksonville Oregon Sentinel became, as the park’s own history recounts, the first published description of the lake.
The waters were of a deeply blue color causing us to name it Blue Lake.
Chauncy Nye, Jacksonville Oregon Sentinel, 1862
On August 1, 1865, two hunters attached to army road crews from Fort Klamath found it again. Sergeant Orsen Stearns was so awestruck that he climbed down into the caldera, becoming the first non-Native American to reach the shore, and Captain F.B. Sprague christened it Lake Majesty. Four years later, in the summer of 1869, newspaper editor Jim Sutton hauled a canvas boat to the rim, explored Wizard Island with four companions, and in his article about the trip swapped in a new name. Crater Lake finally stuck.
6. A Lunch Wrapped In Newspaper Launched The 17 Year Fight For A Park
In 1870, a young man in Kansas named William Gladstone Steel unwrapped his lunch, which had been packed in a newspaper, and read an article about a strange, impossibly blue lake in Oregon. He vowed to see it. His family moved to Portland two years later, but it took until 1885 for Steel to finally stand on the rim. He decided on the spot that the lake should belong to the public forever, and his seventeen year campaign began.
Steel did more than lobby. He assisted Clarence Dutton’s 1886 USGS survey that made those piano wire soundings, fought off sheep grazing and mining interests, and settled for the lake’s inclusion in the Cascade Range Forest Reserve in 1893 while pushing for more. On May 22, 1902, President Theodore Roosevelt signed the bill and Crater Lake became a national park.
Steel never really left. Per the Oregon Encyclopedia, he served as the park’s second superintendent starting in 1913, then stepped down in 1916 to become park commissioner, an office he held until his death in 1934. Oregonians still call him the father of Crater Lake National Park.
7. No River Flows In And No River Flows Out
Every one of the roughly 4.6 trillion gallons in Crater Lake arrived as rain or snow. No river or stream feeds the lake, none drains it, and evaporation and seepage keep the level remarkably steady. Between its recorded low in 1942 and its recorded high in 1975, the surface has varied only 16 feet.
That sealed plumbing explains the famous color. With no inflowing streams delivering dissolved minerals or dust, the water is astonishingly pure, and pure deep water scatters blue light back to the surface. It also explains the clarity. Researchers measure lake clarity by lowering a reflector called a Secchi disk, and readings past 100 feet are rare in most lakes. At Crater Lake they routinely reach 120 feet, and a 1997 reading hit 142 feet.
8. The Old Man Of The Lake Has Floated Upright For More Than A Century
Somewhere out on the lake right now, a 30 foot mountain hemlock log is bobbing perfectly upright with about three feet showing above the surface, exactly as it has since geologist Joseph Diller first recorded it in 1896. Park staff call it the Old Man of the Lake. Carbon dating puts the log’s age past 450 years, and one unproven explanation the park offers for the balancing act is that a century of cold water has soaked and densified the submerged end, holding the Old Man upright like ballast.
The Old Man travels. During a 1938 tracking study, it covered 62.1 miles between July and October, once logging 3.8 miles in a single day. Park lore adds that the Old Man controls the weather. That belief gained followers in 1988, when researchers preparing the submersible dives tied the log off at Wizard Island and storms promptly rolled in, followed by snow in August. By the park’s own account, the scientists released the Old Man quietly, under cover of night.
9. Wizard Island Is A Volcano That Grew Inside The Volcano
Mazama’s collapse did not switch off the magma below. In the centuries after the caldera formed, fresh eruptions built a cinder cone on its western floor even as the water rose around it. Today that cone stands 767 feet above the lake surface as Wizard Island, a name William Gladstone Steel gave it in 1885 for its resemblance to a wizard’s hat, and the NPS park profile notes a tidy crater at its summit, 300 feet across and 90 feet deep.
The summit crater fills with snow each winter and dries out each summer. Jim Sutton’s 1869 boat party spent hours exploring the cone during the trip that named the lake, which means Wizard Island was drawing visitors before Crater Lake was even called Crater Lake.
10. Phantom Ship Carries The Oldest Rock In The Lake Basin
The lake’s other island looks like a ghost ship under sail, masts up and rigging tattered, especially when fog moves across the water. Phantom Ship is 170 feet high, about 500 feet long, and 200 feet wide, the resistant skeleton of an ancient volcanic cone that was swallowed by the growing Mazama and re-exposed when the mountain collapsed.
Its spires are the oldest rock visible in the Crater Lake basin, over 400,000 years old. Everything else you can see from the rim is younger than the stone in that little ship.
11. Scientists Explored The Bottom In A One Person Submarine
What is down there, 1,943 feet below the surface? In 1987, researchers sent a remotely operated vehicle to find out, and in 1988 and 1989 scientists from Oregon State University, working with the park and the USGS, descended in person aboard a one person submersible called Deep Rover.
The dives documented warm, mineral rich fluid seeping from the lake floor, discovered fossil hot spring deposits, and brought back samples of deep water and volcanic rock. In 2000, the multibeam sonar survey finished the job the piano wire started in 1886, collecting more than 16 million soundings and mapping the entire lake floor at a resolution of about 2 meters.
12. The Rim Averages More Than 40 Feet Of Snow A Year
Crater Lake owes its existence to snow, and the park remains one of the snowiest inhabited places in America. The lake is essentially a snow gauge that took 7,700 years to fill. The park’s own records show the yearly average has declined from about 51 feet of snowfall in the 1930s to 41 feet as of 2021, a drop the NPS itself documents, and snow can linger on the rim well into summer.
All that snow shapes every visit. Rim Drive, the 33 mile loop around the caldera, closes to cars each winter and reopens section by section as plows work through spring and early summer, so check the park’s current conditions page before you plan a full circuit. In the white months, rangers lead guided snowshoe walks along the rim instead.
13. The Lake Has Not Frozen Over Since 1949
Here is a riddle. How does a lake buried in 41 feet of annual snow refuse to freeze? The answer is thermal mass. Crater Lake soaks up heat all summer, and that enormous stored warmth, along with wind and relatively mild air, keeps the surface open nearly every winter. The deep water holds near 38 degrees Fahrenheit all year long.
The last complete freeze ran from January to April of 1949. The lake came close twice in 1985, icing over almost entirely in January and again in December, but for more than 75 years now the deepest lake in America has stared up at Oregon’s hardest winters and declined to blink.
14. Reese Witherspoon Filmed Wild On The Rim Of Crater Lake
Thirty-three miles of the Pacific Crest Trail pass through the park, which is how Crater Lake earned its scene in Wild, the 2014 film of Cheryl Strayed’s memoir about hiking the trail alone. Reese Witherspoon and the crew shot on location along Rim Drive in October 2013, because some landscapes cannot be faked on a soundstage, and this is one of them.
In the film, as in the book, the lake marks a critical turning point near the end of Strayed’s journey. A hundred and sixty years before the cameras arrived, the sight of that water stopped John Wesley Hillman’s gold hunt in its tracks. Some places do not lose their power. For more filming locations across the park system, see our guide to classic movies filmed in the national parks.
How To See Crater Lake For Yourself
We will be straight with you. We have not yet filmed at Crater Lake, so we are not going to describe the wind on the rim as if we had felt it. Here is how to collect that experience yourself. Get your first view from the promenade at Rim Village, then walk down to the Sinnott Memorial overlook, perched 900 feet above the water. Hike Watchman Peak at sunset, or earn the only view of the entire lake by climbing Mount Scott. One planning note, the Cleetwood Cove Trail, the lone legal route down to the water, is closed for a major rebuild as of the 2026 season, which also suspends swimming and boat tours, so verify lake access before you go. Our guide to the best things to do in Crater Lake National Park covers every viewpoint and trail.
Where These Facts Come From
Every claim in this article was checked against the sources below in July 2026. Numbers that change over time, like annual visitation and average snowfall, are stated with the year they were reported.
- NPS, Crater Lake History, for the Makalak legend, the 1853 Hillman party, the Nye, Stearns, Sprague, and Sutton accounts, and William Gladstone Steel’s campaign
- NPS, An Introduction to Crater Lake, for depth, clarity, lake statistics, Wizard Island, water temperature, and the 1949 freeze
- NPS, Crater Lake Frequently Asked Questions, and the park’s winter season news release, for water volume, snowfall records, the deepest volcanic lake statement, and the snowiest inhabited place claim
- NPS, The World’s Deepest Lakes, for the 1886 and 2000 depth surveys, the world rankings, and the monument stack comparison
- USGS, Crater Lake volcano, USGS, Bathymetry and the Floor of Crater Lake, and the USGS 2000 multibeam survey data release, for Mount Mazama’s eruptive history, the submersible research, and the sonar survey’s sounding count and resolution
- NPS, The Old Man, for the Old Man of the Lake’s history and the 1938 tracking study
- NPS, Phantom Ship Overlook, for the island’s dimensions and the age of its rock
- NPS, Scenic Rim Drive, and the Cleetwood Cove Trail rehabilitation project page, for the 33 mile loop and the 2026 lake access closure
- NPS, Crater Lake Day Hikes, for Mount Scott’s height and age
- NPS Geodiversity Atlas, Crater Lake National Park, for park acreage
- NPS Stats (IRMA), for 2025 recreation visits
- Oregon Encyclopedia, William Gladstone Steel, for Steel’s superintendent and commissioner years, and the Herald and News, for the 2013 Wild film shoot
Keep Exploring Crater Lake
- Crater Lake National Park Guide, our full trip planning hub
- Best Things To Do In Crater Lake National Park, every viewpoint and trail
- Oregon National Parks Worth Visiting
- Redwood National Park Facts, more history from the Pacific coast
- Olympic National Park Facts, another Northwest icon
- All 63 US National Parks Ranked
- Before you go, check live alerts and air quality on our national park conditions dashboard
What to Bring to Crater Lake
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