Helen Diller Playground (Mission Dolores Park)

The Vaillancourt Fountain at Embarcadero Plaza is San Francisco's accidental splash pad — a brutalist concrete water sculpture that wasn't designed for play but during the rare hot SF summer day, you'll see kids chasing the cascading channels and getting completely drenched. It's not a true splash pad, the concrete is slick, and the design dates to 1971, but for big kids it's a memorable urban adventure right by the Ferry Building. Paid garage parking or BART to Embarcadero. Restrooms in the Ferry Building. Parent gotcha: SF summers are famously cold (Mark Twain's quote applies), so this is mostly an Indian-summer September-October play. Skip toddlers — the design has open ledges and slippery stone. California drought has paused fountain operation in some years, check before going. Pair with Ferry Building lunch and waterfront walk.

Yerba Buena Gardens' children's center is downtown San Francisco's family secret — a carousel, a children's creativity museum, an ice rink, and seasonal water play features all in one beautifully landscaped block. The water features here are gentler and seasonal, more spray-mist than full splash pad, but the surrounding gardens are stunning. Paid garage parking under the gardens. Restrooms in the Yerba Buena Center for the Arts. Best on weekday mornings or right after school lets out. Walk to the SFMOMA, Moscone Center, or grab lunch at one of the SoMa spots. Urban SF at its kid-friendly best.

Modjeska Park is the West Anaheim go-to when you need a free Disney-day decompression that isn't another theme park. The splash pad has both gentle ground sprays for toddlers and arching jets for grade-schoolers, with the Anaheim West Family Resource Center and a working skate facility on the same campus. Free parking is plentiful and restrooms are clean. Best on weekday mornings before the after-school rush around 3pm. Parent gotcha: Anaheim cycles pads off during California drought stage restrictions, so check the Anaheim Parks site the morning of. Pack a picnic for the shaded tables. The freeway noise from the 5 fades fast once kids start running.

Pearson Park is Anaheim's oldest park and the most charming free water spot near Disneyland — about a mile north of the resort. The splash zone is small, toddler-scaled, and ringed by mature trees that throw real shade by mid-afternoon. The amphitheater hosts free summer concerts on weekend evenings, so an early splash and stay-late concert is the move. Free parking, clean restrooms. Parent gotcha: it's seasonal and Anaheim follows state drought rules, so the pad cycles off some afternoons. Walk to the Downtown Anaheim Packing District for tacos after. A hidden retreat from Harbor Blvd traffic.

Waterfront Park is San Diego's downtown crown — an 830-foot interactive fountain that runs the length of the County Administration Building's front lawn with dozens of jets that kids run through in giggling laps. There's almost no shade on the fountain itself, so morning visits before 11am are dramatically more pleasant. The lawn beyond the fountain is huge and great for picnics. Paid garage parking nearby; metered street parking is harder. Clean restrooms in the County Admin building. Walk to Little Italy for lunch. San Diego's most photogenic free fountain.

Civita Park is a Mission Valley masterpiece — modern terraced design, a vibrant splash pad, an amphitheater, and lawns that catch the breeze running up from the river. The splash features cover both age groups and the design feels intentional, not retrofitted. Free parking is in adjacent residential streets and the small lot fills quickly; arrive before 10am or after 4pm. Clean restrooms. Best in the late afternoon when the sun drops behind the bluffs. Walk to Civita's coffee shops and restaurants in the surrounding development. San Diego's most underrated family park.

Pan Pacific Park is the rare central LA spot where you can park for free and let the kids splash without driving to the Westside. The splash pad is small but the playground next to it is big, the picnic areas are shaded by mature trees, and the surrounding lawn is kite-flying friendly. Walking distance to the Grove and Farmers Market for lunch. Free parking is generous but lots fill by 11am on weekends. Restrooms in the rec center are clean. Best on weekday mornings. Mid-City LA family weekends start here.

Yerba Buena Gardens' children's center is downtown San Francisco's family secret — a carousel, a children's creativity museum, an ice rink, and seasonal water play features all in one beautifully landscaped block. The water features here are gentler and seasonal, more spray-mist than full splash pad, but the surrounding gardens are stunning. Paid garage parking under the gardens. Restrooms in the Yerba Buena Center for the Arts. Best on weekday mornings or right after school lets out. Walk to the SFMOMA, Moscone Center, or grab lunch at one of the SoMa spots. Urban SF at its kid-friendly best.