Environment & Science

USFS releases detailed map of San Gabriel National Monument

President Obama designated part of the San Gabriel Mountains a national monument on October 10, 2014. A new map shows the area's boundaries in precise detail.
President Obama designated part of the San Gabriel Mountains a national monument on October 10, 2014. A new map shows the area's boundaries in precise detail.
Benjamin Brayfield/KPCC

The U.S. Forest Service has finally released detailed maps of the newly designated San Gabriel Mountains National Monument.

Earlier this month, President Barack Obama signed a proclamation setting aside 346,177 acres of Angeles National Forest northeast of Pasadena for permanent protection from development.

"We heard from the community that for a lot of urban families this is their only big, outdoor space. And too many children in L.A. County, especially children of color, don’t have access to parks where they can run free and breathe fresh air, experience nature, and learn about their own environment," Obama said at the signing ceremony in San Dimas.

The monument includes the Devils Punchbowl Natural Area, the Mt. Wilson Observatory and the Aliso-Arrastre Special Interest Area.

At the time the monument was designated, the public did not have access to the precise geographic information that would allow mapping in an online service such as Google Maps. 

That information was held up pending final review by the forest service, which said in a release Thursday that it considered factors such as existing infrastructure, land ownership and anticipated management access before determining the appropriate boundaries.

The new map was made available for the public on Thursday. You can explore the area in the interactive map below:

The forest service also published a high-resolution printable map, which is available for download from their website.

This story has been updated.