Sub-Associations Within Mountain Park Ranch Sub-Associations Within Mountain Park Ranch Go back to directory. Add to Address Book. Diamond Ridge II Diamond Ridge IICornerstone Properties Contact: Lisa Richmond 4523 E Broadway Rd Phoenix AZ 85040 work Work Phone: (602) 433-0331 X 9work Work Email: lisa@cpihoa.comINTERNET Website: cpihoa.com Categories: subassociation Updated 11 months ago.