what u.s. island is considered the ellis island of the west

The U.S. island considered the "Ellis Island of the West" is Angel Island, located in San Francisco Bay, California. Angel Island served as the main immigration processing center on the West Coast and was the principal port of entry for Asian immigrants, much like Ellis Island was for European immigrants on the East Coast. It operated from 1910 to 1940 and is known for longer immigrant stays compared to Ellis Island, partly due to restrictive immigration laws like the Chinese Exclusion Act. The island had facilities for long-term stays, including a hospital and dormitories, and many immigrants, especially Chinese, were detained there for extended periods while undergoing interrogation and entry processing.