Exploring the Cleghorn Trail aka OHV Road 2N47 on Surron e-Bike. The Cleghorn Trailhead is located in the Cajon Pass off US HWY 15 between the San Bernardino National Forest on the east and the Angeles National Forest to the west. The trail is a popular moderately challenging route and approximately 14.1 miles point-to-point. The trail encompasses scenic views of the Cajon Pass, US HWY 15, San Bernardino National Forest, the High Desert plateau, and Silverwood Lake