East of San Diego and El Cajon, a great 16 mile loop with 75% singletrack combines these trails with a stretch on the Sunrise Byway. In the scenic Laguna Mountains, the route has smooth rolling singletrack followed by rocky descents and several stream crossings.
To reach the mountain biking trailhead from San Diego, head east on US8 past El Cajon. Exit north onto Sunrise Scenic Byway (FS 1) for 14 miles. Use the Pioneer Mail trailhead. Start riding west on FS 14S02. Turn south on FS 14S02 to the Indian Creek Trail. Follow it east to the Big Laguna Trail. Continue on the BLT back to FS 1 and turn left heading north back to the car.
Overall, Big Laguna / Indian Creek Trails is the 2nd most popular mountain bike trail of all 132 mountain biking rides in California.