ğ Town & Country Resort San Diego. This retro spot in Mission Valley has three pools, a hot tub and a four-story water slide called Twister. You can find day passes on ResortPass.com. ğï¸ Catamaran Resort and Spa. This Mission Bay hotel has options to book a pool day or spa day, or reserve a beach chair at their kid-friendly spot on the bay. ğ¿ Omni La Costa Resort & Spa. This Carlsbad spot has a family pool perfect for younger kids with a shallow beach entry and sandcastle area.