In the roughly triangular shaped park, there are three main trails along the long, straight boundaries, plus two smaller trails. On the northern edge of the park you'll discover Cold Springs Trail, which runs about 1/2 mile from the main park entrance to a fire road near Oak Point Campground. Where this trail ends you can pick up the 1/2 mile Valley View Trail which hugs the western park border, passing Valley View Campground and ending at the big southwest parking lot. From this parking lot to the observatory runs the Carmen Trail, less than a 1/2 mile. The short Tony's Trail runs just 0.2 miles back to the park entrance, completing the roughly 1.5 mile park loop trail system. The last little spur trail, called the Fremont Peak Trail, takes you from the southwest parking lot to the top of Fremont Peak, a 0.6 mile trail rising about 250 feet in elevation.
From Route 156 at San Juan Bautista to the parking areas of Fremont Peak is about 11 miles along San Juan Canyon Road. The beginning of this road is flat and traverses the old stage coach route. As it starts to gain elevation you will pass through several ranches with horses, cattle, and even some llamas or alpacas. After about five miles the ranches stop and there are some fancy houses up some of the side roads. The last few miles of the road break above the tree line and it gets very curvy, with steep drop offs over the edge. This stretch also has several pull-off areas to photograph the panoramic views to the north.
Because of the winding roads the maximum camper length and the maximum trailer length allowed is 25 feet