3.70 G.P.A. is quite good.
You won't have a problem getting accepted to Cal Poly Pomona. Wouldn't be hard to get accepted to San Luis Obispo also.
Cal Poly San Luis Obispo is considered a better institution and higher ranked according to many college reviews. It is your choice.
Why not UC?
I haven't seen a single cow as of yet but I've seen dozens in high school. Mooo~