You might plan to attend mass at San Francisco de Asis (Mission Dolores) in San Francisco. This is the most authentic mission in the Bay area and the only original church.
Visits to / Tours of Missions / Details About Visiting
The San Fernando Rey mission is located in the middle of the triangle formed by Interstate 5, Interstate 405, and the Simi Valley Freeway (California 118) at the North end of the San Fernando Valley, to the North of Los Angeles. Navigate to this area and find your way to Sepulveda Blvd. heading North. Turn right at San Fernando Mission Blvd. just past where Sepulveda crosses under the 118 Freeway. The mission is a short distance on the left at 15151 San Fernando Mission Blvd.
My recommendations are:
The closest mission to you is San Luis Rey, in Oceanside.
The best map on the missions is California Missions, which contains original artwork created by Francois Davot. It sells for $5.95.
There are a number of companies that offer packaged tours of The California Missions .
To properly answer this question depends on the answer to
some other questions:
1. Do you want to see all the missions in a "grand tour" or break the visit into segments?
There is no annual pass. The missions are individual entities that set their own schedules and entry fees. Most are active catholic churches where there is no fee for entering the church for mass but where there is a fee for entering the mission grounds and completing a full tour. Entry is usually through a mission gift shop. The missions which are state parks (for example, La Purisima) also have an entrance fee.