Check out the San Diego Spaniel Rescue socials. Their site says, "Join fellow Cocker Spaniel owners (and their dogs!) for a leisurely get together....Your Spaniels can run and play in the fenced-in dog park. This is a great opportunity to bond with your canine companion while providing socialization skills."
9/4---Doyle Park, Dog Park 1:00pm - ? at 8175 Regents Road, San Diego, CA. 92122
9/18--Oceanside Dog Park 11:00am - ? pm at 2905 San Luis Rey Road, Oceanside, CA. 92054