Southeast of Half Moon Bay in the Purisima Creek Redwoods, the Purisima Creek Trail starts in the Purisima Creek Redwoods Open Space Preserve on the western slopes of the Santa Cruz Mountains.
To reach mountain biking at the Purisima Creek Trail trailhead from Half Moon Bay, head south on US1 for about 5 miles to Verde Road / Purisima Creek Road. Turn left heading east on Verde Road and continue following Purisima Creek Road for 3 miles. The trailhead parking area is located on the right at the intersection with Higgins Purisima Road.
Overall, Purisima Creek Trail is the 22nd most popular mountain bike trail of all 132 mountain biking rides in California.