If your child does not attend St. Isidore or Faith Formation, he or she must live within the parish boundary to be eligible to participate in our program. We check boundaries but do not do so immediately because of the high number of registrants. If you register for our program and it is later discovered that you are not within our boundaries, your child will not be accepted into our program and could miss registration for the correct program.

Please check the boundary information below to confirm you live within our parish boundary. If you do not live within the boundary, you will need to find the parish within which you reside and contact them for information about their program (for an interactive map, go to Oakland Diocese).

Below is a description of the St. Isidore Parish boundary:

• North: From the intersection of a westerly extension of Livorna Road and a southerly extension of Castle Crest road east along Livorna Road to Livorna Heights Road, north to the end of Livorna Heights Road, then in straight lines northeasterly to the most westerly corner of Diablo Foothills Regional Park and east to the summit of Mt. Diablo.

• East: From the summit of Mt. Diablo southeast to Windy Point, southeast to the intersection of Highland Road and Collier Canyon Road.

• South: From the intersection of Highland Road and Collier Canyon Road west along Highland Road to Tassajara Road, north and west along Camino Tassajara and Sycamore Valley Road to the end of Gerald Drive, then on a direct line west to the Las Trampas Ridge.

• West: From a point on the Las Trampas Ridge directly west of the end of Gerald Drive, northwest along the ridge to the southern boundary of Rossmoor, northeast to the intersection of a westerly extension of Livorna Road and a southerly extension of Castle Crest Road.