Except for 38 frogs that were rescued in 2024, all of the other southern mountain yellow-legged tadpoles and frogs were bred ...

U.S. Geological Survey biologist Elizabeth Gallegos leads her team on a hike to release Southern California mountain yellow-legged frogs into a pair of remote creeks in the San Gabriel Mountains.

The San Gabriel Mountains monument expansion adds 105,919 acres of Angeles National Forest land to the existing 346,179-acre SGM monument, ... unique geology, and dynamic forests, ...

An earthquake hit the San Gabriel Mountains north of Rancho Cucamonga on Dec. 8, 2021. ... according to the U.S. Geological Survey. It occurred at a depth of 3 miles.