• Identified by the Guinness Book of World Records as America's largest sea cave
• Sea Lions Caves are the natural seasonal home to Steller (Northern) sea lions
Privately owned since 1932, Sea Lion Caves is a wildlife preserve in the Cape Perpetua Marine Reserve. Made of basalt rock, the grotto is the height of a 12-story building (125 feet) and the floor size of a football field (two acres).
The world's largest caves are located on Highway US-101, 10 miles north of Florence and 14 miles south of Yachats on Highway US-101. The cave is accessible by a steep path from the visitor center and the elevator. On the way to the elevator, you'll enjoy a fantastic panorama of the ocean, the picturesque Heceta Head Lighthouse, and the dynamic spectacle of sea lions swimming in the surf. Additionally, during the winter season, migrating whales enhance the coastal scenery.
The elevator transports visitors to the grotto, a natural seasonal haven for Steller (Northern) sea lions. Here, they can be observed engaging in various activities, from roaring and fighting to swimming or simply lounging on the rocks. Sea lions can also be viewed behind a wire fence in the huge grotto.
The grotto's walls are coated with lichens, algae, and minerals, creating vibrant stains in shades of green, pink, purple, and red.
The colony of animals uses this cave as a shelter during the winter months. They move to rock ledges outside of the cave in spring and summer. So, if you want to find sea lions in the grotto, the best times to visit are the late fall and winter months.
Inside the grotto, you'll find the skeletons and bones of ancient sea lions. Interpretive displays and a short video about the cave and its animals are available. Flash photography is not allowed in the grotto.
Sea Lion Caves Inhabitants
Sea Lion Caves is home to diverse wildlife, with the main inhabitants being Steller (Northern) Sea Lions. These caves are their natural seasonal habitat, making it the sole known mainland residence for hundreds of these majestic animals.
Steller Sea Lions or Northern Sea Lions
Steller or Northern Sea Lions, the largest species within the eared seal family, exhibits impressive physical characteristics. Mature males can weigh up to a staggering 2,400 pounds (over 1,000 kilograms) and measure around 10 feet (3 meters) in length. Females are slightly smaller, weighing approximately 700 pounds (317 kilograms) and measuring 7-8 feet (2-2.4 meters). Dark brown flippers complement their distinctive yellowish-brown coloration and emit a deep, resonant roar. Notably, sea lions have visible ear flaps and can turn their hind flippers under their bodies, enabling them to walk.
Steller Sea Lions are highly polygamous, with males mating with 15-30 females during the breeding season. Dominant males, or bulls, engage in fierce battles to secure the best territories. These sea lions are summer breeders, with females typically giving birth to a single pup each year and nursing them for up to three years.
California Sea Lions & Harbor Seals
In addition to Steller Sea Lions, Sea Lion Caves also host a few California Sea Lions and harbor seals.
Sea Birds
The cavern's high vault provides a resting area for various seabirds. Three types of gulls—western, herring, and California gulls—are among the avian residents.
Additionally, visitors may spot cormorants, pigeon guillemots, grouse, tufted puffins, quail, and various other seabird species.
Camping, Lodging & Vacation Rentals at Sea Lion Caves
For those seeking camping options near Sea Lion Caves, the closest campground is located 3 miles north at Carl G. Washburne Memorial State Park. This campground offers visitors a diverse range of camping options, including RV and tent sites, yurts, and a hiker/biker camp.
Alternatively, if you prefer more affordable lodging and vacation rentals, the coastal towns of Florence and Yachats are conveniently located just a few miles away.
Affordable vacation rentals for short and long term stay in Florence
Affordable vacation rentals for short and long term stay in Yachats
Video
Sea Lion Caves | Facts
Identified by Guinness Book of World Records as America's largest sea cave
Region: Central Oregon Coast • USA
Open: 363 days a year (except Thanksgiving & Christmas) from 9 am to 4 pm
Amenities: Gift shop, interpretive displays, video.
Day-use fees: Yes
Discovered: 1880
Opened to the public: 1932
Grotto Height: 125 ft (38 m)
Grotto Acreage: 2 acres (0.81 ha)
Adventures Nearby
Directions to Sea Lion Caves
From Florence, drive 10 miles north via Highway 101.
From Yachats, follow about 15 miles south along Highway 101.
Phone: 541-547-3111
sealioncaves.com