The San Bernardino Mountains are a mountain range located in Southern California, primarily within San Bernardino County. They are part of the larger Transverse Ranges and feature diverse ecosystems, including forests of pine and cedar. The area is popular for outdoor activities such as hiking, camping, and skiing, particularly at resorts like Big Bear Lake and Lake Arrowhead. The mountains rise to an elevation of over 10,600 feet at San Gorgonio Mountain, the highest peak in Southern California. The region is also home to several protected areas, including the San Bernardino National Forest, which offers a habitat for various wildlife species and recreational opportunities for visitors year-round.