California's Channel Islands, often called the Galapagos of North America, are home to a wealth of unique wildlife and landscapes. From the weather-beaten pinniped habitats of São Miguel Island to the vast sea caves and vast variety of endemic species on Santa Cruz Islandspecies, each of these five protected islands holds its own secrets. Satellite imagery reveals the islands' diversity and ecological richness, and visitors willing to venture across the Santa Barbara Channel will have the rare experience of seeing nature's pristine beauty and appreciating ongoing restoration efforts.

Located off the coast of Southern California, the Channel Islands are often referred to as the "Galapagos of North America." Like the famous islands off Ecuador, this tiny archipelago is home to a huge variety of flora and fauna in a small space. Many of these species, such as the island fox, are found nowhere else on Earth.

Of the eight Channel Islands, five are part of Channel Islands National Park. Four of the islands - San Miguel, Santa Rosa, Santa Cruz and Anacapa - stretch about 60 miles (100 kilometers) across the Santa Barbara Channel. The fifth island, Santa Barbara, is the smallest island and is located further to the southeast.

On March 18, 2025, the NOAA-20 satellite's VIIRS (Visible Infrared Imaging Radiometer Suite) captured a clear view of the park's five islands from space, as shown above.

Close yet unique: the island’s diversity

Although the northern islands are relatively close to each other, each island has its own unique landscape and ecology. Other satellite images taken on the same day by the Landsat 8 satellite using its OLI (Land Imager) satellite highlighted these differences.


São Miguel is the westernmost and one of the most remote islands in the Channel Islands. The island is known for its rugged, windswept landscape and is home to one of the largest seal and sea lion colonies on the Pacific coast.

Isla San Miguel is the farthest island from Ventura, a popular starting point for trips to the islands and home to one of the park's visitor centers. (There is another visitor center on the Santa Barbara mainland.) However, for some intrepid travelers, the 70-mile (113-kilometer) journey may be worth a try. Point Bennett on the island's far west offers a landscape of windswept sand and vegetation. Its beaches are home to one of the largest colonies of pinnipeds (mammals including seals, sea lions and walruses) on the west coast of North America.


Santa Rosa Island, the second largest island in the park, once contained vast cloud forests fed by thick fog. Although overgrazing has wiped out large numbers of trees, restoration efforts are helping native oaks and pines slowly recover.

The next island to the east is Santa Rosa, 40 miles from Ventura. Cloud forests - groves of tall oaks and pine trees that draw moisture from the region's thick fog - were once ubiquitous across the island. While there are still pockets of cloud forest, such as on the slopes of Montenegro, most cloud forest was severely damaged by cattle grazing in the 19th and 20th centuries. National Parks, the U.S. Geological Survey and their partners have been working to restore native vegetation and help the forest begin to recover.

Santa Cruz Island is the largest of the Channel Islands and a biodiversity hotspot, home to more than 60 species found nowhere else.

East of Santa Rosa is Santa Cruz Island, just 20 miles from Ventura. The island is the largest in the park, covering 96 square miles and includes the park's highest peak, Mount Diablo (2450 ft/750 m). The land is three times the size of Manhattan, providing ample space for unique flora and fauna. There are more than 60 endemic species, the highest number of endemic species among any of the Channel Islands. However, the island's most attractive attraction is its surrounding area. At the western end of the island's north side, visitors can find the entrance to the Painted Cave, one of the largest known sea caves on Earth.

Anacapa Island is the closest island to mainland California, just 14 miles (23 kilometers) from Ventura. However, like traveling to other islands, getting to Anacapa requires advance planning; visitors can only access it by boat. Park concession boats provide transportation to some islands year-round, and others are open seasonally. Upon arrival, visitors typically explore the island on foot or by kayak.

NASA Earth Observatory image by Lauren Dauphin, using MODIS data from NASA's EOSDIS LANCE and GIBS/Worldview and Landsat data from the U.S. Geological Survey.

Compiled from /scitechdaily