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.
Weir Canyon Trail in Weir Canyon Wilderness Park in Santiago Oaks Regional Park
Where can you go for a loop hike in a wilderness area in Orange County? Why, Weir Canyon of course. Weir Canyon Trail provides a 3.8-mile loop over undulating terrain on the side of Weir Canyon in the Anaheim Hills below the Santa Ana Mountains. There is 350 feet of elevation between the high and low points of the loop, but all the ups and downs along the trail make it feel more like a hike with a thousand feet of elevation gain. ...Read more.
Distance: 3.8 miles · Elevation change: 350 feet
By: Published: November 4, 2013 Last updated: April 9, 2026
West Bluff Trail Loop in Upper Newport Bay Nature Preserve
Newport Bay is a vital stopover for birds migrating across Southern California. Hikers can explore the estuary too, on trails in Upper Newport Bay Nature Preserve, a 142-acre coastal habitat managed by the Orange County Parks Department. The preserve's West Bluff has a few trails (some open to equestrians and bikers) that provide easy hikes of a mile or more, including the 2. ...Read more.
Distance: 2.5 miles · Elevation change: 75 feet
By: Published: September 26, 2013 Last updated: December 5, 2025
El Cariso Campground in the Santa Ana Mountains
El Cariso Campground is a 24-site campground in the Santa Ana Mountains near the intersection of Ortega Highway (Route 74) and Main Divide Road on the border between Orange County and Riverside County. At 2,600 feet above sea level, the campground straddles a scenic mountain pass and can be reached easily from Lake Elsinore to the east or San Juan Capistrano to the west. ...Read more.
By: Published: August 2, 2013 Last updated: April 9, 2026
El Cariso Nature Trail in the Santa Ana Mountains
El Cariso Nature Trail is a self-guided hike in the Santa Ana Mountains, beautifully situated on the range's main divide straddling the border of Orange and Riverside counties. The 1.35-mile loop is lined with small panels that identify and describe the area's plants. Starting just off Ortega Highway, at 2,600 feet above sea level, the short loop presents excellent views across the range. ...Read more.
Distance: 1.35 miles · Elevation change: 125 feet
By: Published: August 2, 2013 Last updated: December 5, 2025
San Jacinto Peak via Marion Mountain Trail in the San Jacinto Mountains
San Jacinto Peak is one of the true crowns of Southern California and is a crowning achievement for any hiker who reaches the summit. San Jacinto Peak is the second highest mountain in Southern California and the pinnacle of the San Jacinto Mountain Range at 10,834 feet above sea level. Hikers who spar with San Jacinto Peak should be prepared for an all day challenge. ...Read more.
By: Published: July 8, 2013 Last updated: April 10, 2026