Lake Cuyamaca: Just outside San Diego ... Rent a motorboat, rowboat, carp, kayak, or pedal boat. Afterward, relax by the lake and enjoy the various picnic and barbecue areas.

Stonewall Peak, at 5,730 feet, is situated south of Lake Cuyamaca and directly across from the Paso Picacho Campground. It’s a roughly 4-mile, easy-to-moderate hike along the Stonewall Peak ...