Hikes in San Diego County

San Diego County is located at the bottom of California and covers over 4,500 square miles from the Mexican border up to Orange and Riverside counties. Despite being the second most populous county in California, San Diego County has a wide variety of outdoor opportunities for hikers ranging from coastal strolls to mountain ascends to desert trails. ... Read more.
Heart Rock in the San Bernardino Mountains
How is it possible? How is it possible that a perfectly heart-shaped hole could form in the rock wall flanking Seeley Creek Falls? This amazing formation does exist and can be reached via a short, relatively easy one-mile round trip hike in the San Bernardino Mountains near the town of Crestline. The dirt trail to Heart Rock descends 200 feet, following Seeley Creek on a gradual northward descent through a mountain forest of black oaks and Jeffrey pines. ...Read more.
Distance: 1.4 miles · Elevation change: 200 feet
By: Published: November 28, 2012 Last updated: December 5, 2025
Marshall Peak in the San Bernardino Mountains
The San Bernardino Mountains are a rugged east-west running mountain range in San Bernardino County east of the San Gabriel Mountains. While the range tops out at the 11,500-foot summit of San Gorgonio Mountain, you can find great panoramic view from a 4,000-foot peak that is much easier to reach. Marshall Peak rises above the foothills of the mighty San Bernardino Mountains and is just a short trip from cities in the San Bernardino Valley. ...Read more.
Distance: 3.25 miles · Elevation change: 375 feet
By: Published: November 28, 2012 Last updated: May 1, 2026