Many good replies already.. I think you mean Mission Blvd stretching from Pacific Beach to south Mission Beach? Many good restaurants and bars in PB but definitely a younger crowd. World Famous is a good one and stop by Mr. Frosty for some dessert. La Jolla is a short drive north with higher-end restaurants and shopping and offers a cool ocean-wildlife experience. Mt. Soledad is up the hill from La Jolla and offers views and is a veterans memorial. The Birch aquarium is also a great stop assuming it's open. Glider port in Torrey Pines, Mission trails park with the various hikes, Cabrillo monument in Point Loma... I can go on and on. I've lived here my whole life and it's tough to run out of things to do or see. The June weather comment is spot on - high chance of marine layer the whole day especially at the beach.