Canyon High School: Blacktop banks with a fence that you are able to stall on.
El Rancho School: Stairs,wallrides, and ledges.
Bernardo Yorba Middle School: Stairs,handrails,banks, and gaps.
Esperanza High School: Manual Pad and ledges.
There is also a school down Santa Ana Canyon (towards the 55 freeway) that has banks, a bank to subrail, and lots of stairs.
If you live in Yorba Linda, there are lots of spots, you just have to find them. Most of the spots are located in schools.