Crater Lake National Park

Crater Lake National Park sits in the Cascade Range of southern Oregon, about 60 miles north of Klamath Falls. The park covers 183,224 acres and is built around a single caldera — the collapsed remnant of the volcano Mount Mazama — that holds the deepest lake in the United States at 1,943 feet. The lake's water is fed entirely by rain and snowmelt, with no rivers flowing in or out; the water is among the purest on Earth, giving the lake its distinctive deep blue color visible for miles. Crater Lake ranks 38th among the 63 U.S. national parks by annual visitation, drawing roughly 700,000 visitors in 2023. The 33-mile Rim Drive circles the caldera at about 7,100 feet elevation and is the primary way to see the lake; it is typically open from late June or early July through October, with snow closing it in both directions for the rest of the year.

The deepest lake in the United States at 1,943 feet and one of the deepest in the world — the water is so pure that a white disk can be seen 120 feet below the surface, and the blue color is visible from aircraft at cruising altitude.
Wizard Island, a cinder cone that formed inside the caldera after the main collapse and rises 764 feet above the lake surface, reachable by a concessionaire boat tour from Cleetwood Cove — the only legal access point to the lakeshore.
The 33-mile Rim Drive, open July through October at approximately 7,100 feet elevation, with more than a dozen overlooks circling the caldera and views that change with each turn of the road.
The Old Man of the Lake, a 30-foot bleached log that has been floating vertically in the lake since at least 1896, drifting around the caldera driven by wind while remaining upright — a natural curiosity documented by scientists for over a century.

By car: The South Entrance on Oregon Highway 62 is open year-round and is the only entrance accessible in winter. From Medford, take OR-62 north and east approximately 75 miles (about 1.5 hours). From Klamath Falls, take US-97 north to OR-62 west, approximately 60 miles (about 1.25 hours). From Portland, the drive south on I-5 and east on OR-62 is about 280 miles (5 hours). The North Entrance on OR-138 opens when snow allows, typically in late June or early July, and is the approach from Roseburg and Eugene.

By air: Rogue Valley International–Medford Airport (MFR) is approximately 75 miles southwest and offers daily connections to Seattle, San Francisco, Los Angeles, and other hubs. Rental cars are available at the airport. Eugene Airport (EUG) is about 140 miles north and has more flight options. Portland International (PDX) is about 285 miles north.

By shuttle: No public transit serves the park. A car is the only practical way to reach and move around Crater Lake. The park's size and the 33-mile Rim Drive make a rental car essential for any meaningful visit. Ride-share services do not operate to or within the park.

Crater Lake occupies a caldera — a collapsed volcanic structure — rather than an impact crater, despite the name. Mount Mazama, a composite volcano in the Cascade Range, stood roughly 12,000 feet tall before its catastrophic eruption approximately 7,700 years ago. The eruption expelled an estimated 12 cubic miles of material in one of the most powerful volcanic events in North American geological history — about 42 times more powerful than the 1980 eruption of Mount St. Helens. As the magma chamber emptied, the overlying peak collapsed inward, leaving a bowl-shaped depression about 5 miles wide and up to 4,000 feet deep.

Over the next several centuries, rain and snowmelt filled the caldera. Because no rivers flow in or out, the lake's level is maintained entirely by precipitation minus evaporation — a balance that fluctuates only slightly year to year. The water clarity is exceptional: a white Secchi disk can be seen at depths of up to 120 feet. The intense blue color results from depth and purity — water molecules absorb longer red wavelengths of light and scatter the shorter blue wavelengths, producing a blue that deepens with increasing depth.

Wizard Island is a cinder cone that formed within the caldera after the main collapse, when volcanic activity resumed on a smaller scale. It is the most visible feature of the caldera's continued geological activity. The Phantom Ship, the small rocky island in the southern lake, is made of older lava dikes that were part of Mount Mazama's internal plumbing system before the collapse — the oldest exposed rock in the park.

The pumice and ash deposits from the Mazama eruption blanket the surrounding landscape and are found throughout the Pacific Northwest and into Canada. This ash layer, called the Mazama Ash, is used by archaeologists and geologists as a dating horizon — any site with artifacts above the ash layer postdates the eruption. The Pinnacles, a field of hollow volcanic spires in the park's southeast section, formed when the hot ash welded around fumarole vents and the surrounding material eroded away.

Clark's nutcrackers are among the most conspicuous birds in the park and are seen at nearly every rim overlook and trailhead. This gray-and-black bird caches tens of thousands of whitebark pine seeds each fall and is the primary vector for whitebark pine regeneration at high elevation throughout the Cascades. Steller's jays and ravens are year-round residents at Rim Village, where they exploit visitor food sources despite posted warnings against feeding.

Black-tailed deer move through the subalpine meadows on the caldera rim throughout summer and are common near the campgrounds at dawn and dusk. Black bears are present in the park but are rarely encountered and typically avoid the busy rim area; bear-resistant food storage containers are required at Mazama Campground. Yellow-bellied marmots sun on rock outcrops along the Rim Drive and are loud and visible in July and August. Pikas — small round-eared relatives of rabbits — call from talus slopes on the caldera walls.

Bald eagles nest near the lake and are seen soaring over the caldera on most summer mornings. Ospreys fish from the rim overlooks, diving into the lake from remarkable heights. The lake contains kokanee salmon (a land-locked form of sockeye) and rainbow trout, both introduced species; fishing is permitted in the lake and streams without a state license.

The whitebark pine, which dominates the subalpine zone above 7,000 feet around the caldera rim, is a keystone species in rapid decline from white pine blister rust disease and bark beetle infestation. Crater Lake is participating in NPS and Forest Service efforts to identify and propagate rust-resistant individual trees. The loss of whitebark pine reduces food availability for Clark's nutcrackers, red squirrels, and grizzly bears in other parts of the Cascades.

The Klamath and Modoc peoples have lived in the region surrounding the Cascades for at least 10,000 years. The Klamath people call the lake Giiwas. Their oral traditions describe a great battle between Llao, spirit of the Below-World who lived in the mountain, and Skell, spirit of the Above-World, that resulted in the mountain's destruction — a tradition that preserves a memory of the actual catastrophic eruption 7,700 years ago. Archaeological sites around the lake show that people were present in the area shortly after the eruption, and obsidian tools made from Cascade volcanic glass appear in the ash-covered landscapes of the period.

The first Euro-American to record seeing the lake was John Wesley Hilman, a prospector searching for a legendary gold mine who stumbled upon the rim in June 1853 and called the water Deep Blue Lake. Subsequent explorers gave it other names before Crater Lake became standard after 1869. The lake's existence remained largely unknown outside the region until the 1870s.

William Gladstone Steel, an Oregonian who read about the lake as a teenager in a Kansas newspaper wrapped around his school lunch, made his first visit in 1885 and dedicated the next 17 years to securing federal protection. He lobbied Congress, guided government officials to the rim, and organized geological surveys. President Theodore Roosevelt signed the bill establishing Crater Lake National Park on May 22, 1902, making it Oregon's only national park and one of the first six national parks in the country. Steel was appointed the park's first commissioner.