San Bernardino National Forest

The San Bernardino National Forest is a United States national forest in Southern California encompassing 823,816 acres (3,333.87 km2) of which 677,982 acres (2,743.70 km2) are federal. The forest is made up of two main divisions, the eastern portion of the San Gabriel Mountains and the San Bernardino Mountains on the easternmost of the Transverse Ranges, and the San Jacinto and Santa Rosa Mountains on the northernmost of the Peninsular Ranges.

Source: Wikipedia — San Bernardino National Forest (CC BY-SA 4.0)