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Water Parks & Splash Pads

🌊 Water Parks & Splash Pads for Kids in Mercer Island, WA

15 water parks, splash pads, and swimming spots rated and reviewed by families.

Activities & Venues in Mercer Island

Gas Works Park city park in Fremont, WA🌳 Park
Photo: David McBee
4.7(11,227)Free7 mi · Fremont

Gas Works Park offers a unique blend of industrial history and outdoor fun that captivates kids and adults alike. The park's iconic rusted machinery creates a one-of-a-kind playground atmosphere, while the massive grassy hill is perfect for kite flying, rolling down, and taking in breathtaking views of Lake Union and the Seattle skyline. With a dedicated play area, wide-open spaces for running, and plenty of picnic spots, it's a Seattle must-visit that combines education, recreation, and stunning scenery.

🕑 2-3 hours

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Marymoor Park park in Redmond, WA🌳 Park
Photo: Scotty Brown
4.7(6,122)Free8 mi · Redmond

Marymoor Park is Redmond's crown jewel for family adventures, spanning 640 acres of endless exploration. With multiple playgrounds, a unique climbing rock, miles of paved and unpaved trails perfect for bikes and strollers, plus vast open spaces for kite flying and picnics, this park offers something for every member of the family,including your four-legged friends at the popular off-leash dog area.

🕑 3-5 hours for a full family outing, or 1-2 hours for a quick playground visit

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Kubota Garden garden in Seattle, WA🌳 Park
Photo: Darren Trapp
4.7(5,284)$4 mi away

Kubota Garden offers families a serene escape with 20 acres of beautifully landscaped Japanese gardens featuring koi ponds, wooden bridges, and cascading waterfalls. Kids will love spotting fish, exploring winding paths, and discovering stone lanterns hidden throughout the grounds, while parents appreciate the free admission and peaceful atmosphere that's perfect for teaching little ones about nature and different cultures.

🕑 1.5-2.5 hours

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Lake Sammamish State Park state park in Issaquah, WA🌳 Park
Photo: Spencer Lau
4.7(5,195)Free8 mi · Issaquah

Lake Sammamish State Park is a Pacific Northwest gem offering 512 acres of family fun along the lake's sunny east shore. With two swimming beaches, excellent playgrounds, sprawling picnic areas, and calm waters perfect for young swimmers, it's an ideal spot for families seeking outdoor adventures with breathtaking Cascade Mountain views as your backdrop.

🕑 4-6 hours for a full beach day; 2-3 hours for playground and picnic visits

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Grass Lawn Park park in Redmond, WA🛝 Playground
Photo: Kalyan Nistala
4.7(3,363)Free8 mi · Redmond

Grass Lawn Park is a beloved Redmond neighborhood gem that consistently impresses families with its innovative playground equipment and well-maintained facilities. With its combination of modern play structures, covered picnic areas perfect for birthday parties, and spacious green lawns ideal for running off energy, this park offers something for every member of the family to enjoy.

🕑 1.5-3 hours

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Luther Burbank Park park in Mercer Island, WA🌳 Park
Photo: Changhyeon Bae
4.7(2,347)Free

Luther Burbank Park is Mercer Island's crown jewel for family fun, offering 77 acres of waterfront activities that keep kids entertained for hours. With a sandy swimming beach on Lake Washington, expansive playground, fishing dock, and miles of trails, it's a one-stop destination where families can swim, play, picnic, and explore nature all in one visit.

🕑 3-5 hours

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Ebright Creek Park park in Sammamish, WA🌳 Park
Photo: Raja N
4.7(333)Free8 mi · Sammamish

Ebright Creek Park is a hidden gem in Sammamish where kids can explore nature right alongside a babbling creek. With easy walking trails, opportunities to spot local wildlife like birds and salamanders, and hands-on learning about Pacific Northwest ecosystems, it's perfect for families who want to combine outdoor play with educational discovery in a peaceful setting.

🕑 1-2 hours

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Gene Coulon Memorial Beach Park city park in Renton, WA🌳 Park
Photo: Bee (M.C.)
4.6(6,772)Free5 mi · Renton

Gene Coulon Memorial Beach Park is a lakefront gem offering families everything needed for a perfect day outdoors. With a designated swimming beach, multiple playgrounds, a scenic 1.5-mile walking path along Lake Washington, and expansive grassy areas, this park delivers variety that keeps kids of all ages entertained while parents soak in stunning water and mountain views.

🕑 3-5 hours for a full beach and playground day; 1-2 hours for a quick walk or playground visit

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Idylwood Park park in Redmond, WA🌳 Park
Photo: Neha Gupta
4.6(2,531)$7 mi · Redmond

Idylwood Park is a premier Lake Sammamish destination offering families a complete summer beach experience with a designated swimming area, well-maintained playground, and plenty of grassy space for picnics and play. With seasonal lifeguards on duty and excellent amenities including covered picnic shelters, it's an ideal spot for a full day of lake fun without traveling far from the Seattle area.

🕑 3-5 hours (perfect for a half-day or full beach day)

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May Creek Park park in Renton, WA🌳 Park
Photo: Calvin Osborn
4.4(236)Free4 mi · Renton

May Creek Park is a hidden gem offering families a perfect blend of natural beauty and playground fun in the Newcastle area. Kids can explore wooded trails, splash in the creek, and burn energy on the playground equipment, all while parents enjoy the peaceful, tree-covered setting and ample picnic areas for snacks or meals.

🕑 2-3 hours

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Liberty Park city park in Renton, WA🌳 Park
Photo: Tony Da-Tiger
4.3(885)Free6 mi · Renton

Liberty Park is Renton's premier family destination, offering something for every age with its multiple playgrounds, expansive grassy areas, and well-maintained sports fields. With plenty of picnic shelters and walking paths, it's perfect for everything from active play to relaxed family gatherings, making it a go-to spot for locals and visitors alike.

🕑 2-4 hours

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Henry Moses Aquatic Center water park in Renton, WA🌊 Water Park
Photo: Lisa Barajas
4.3(555)$6 mi · Renton

Henry Moses Aquatic Center is Renton's premier indoor swimming facility offering year-round aquatic fun for the whole family. With a recreational pool featuring a water slide, dedicated lap swimming areas, and professional swim lessons, this well-maintained facility provides both entertainment and skill-building opportunities in a comfortable indoor environment.

🕑 2-3 hours

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