The San Diego River Crossing Trail is a two-way fire access road that connects the northwest of the park at North Perimeter Trail to Mission Gorge Road. The middle section is fairly flat, but there are some moderate grades on either end.
The southern trailhead and parking is located at the intersection of Mission Gorge Road and Jackson Drive. The northern trailhead is accessed via Portobelo Drive. This trailhead does not have readily available parking, so park at your own risk.