Biden OKs Expansion of San Gabriel Mountains National Monument

The move adds nearly 106,000 acres of U.S. Forest Service land to the south and west of the LA County site.

Clouds hover around the lightly snow-capped San Gabriel Mountains in Los Angeles on Feb. 7, 2024. Frederic J. Brown/AFP via Getty Images

President Joe Biden signed a proclamation May 2 approving the expansion of two national monuments in California—the San Gabriel Mountains National Monument and the Berryessa Snow Mountain National Monument.

Using the Antiquities Act of 1906, Mr. Biden created new boundaries for the monuments and added land to preserve wildlife, biodiversity, and sites significant to Native American culture.