Schedule of Tridentine Masses In Orange County, there are currently two churches where the Tridentine Mass is regularly offered with the approval of the Most Reverend Tod D. Brown, Bishop of Orange. Fr. Serra Chapel Mission San Juan Capistrano 31522 Camino Capistrano San Juan Capistrano, CA 92693 (949)258-2000 Sundays: 8:00am (High Mass every Second Sunday of the month, Low Mass on other Sundays) Note: Entry to the Fr. Serra Chapel is via the Mission gate on El Camino Real one block north of the Ortega Highway.
UPDATE: yes, per comment below see link for full updated listings–above happens to be the one i take my family to. uvoc.org has an app to sign up for newsletter.
UPDATE 1/1/2010: another great (even more traditional) Latin Mass in Garden Grove, see http://olhc.us/ for info – found out about it because several of my concealed carry (CCW) students bumped into each other (must be a pretty good conservative bunch of Catholics); rumor has it one of the priests has an AK or something similar.
there are more than two – there is also the JP2 center and I think one or two others on Orange County