Yah thats one of the areas, including the whole track area... track makes a decent landing strip. The area with a read border below is where i was actually talking about (i scribbled red on the same area you did for reference), its a really nice big area when you can get back there and no one is practicing. the area bordered by coloma rd with four baseball diamonds on the corners is good too for belly floppers when there is football practice.
PS the two red "x's" is where my first plane (EZ star) disappeared into last year
Okay, my screenshot skills are weak, you beat me to it.