If you live on the Eastside, you already know, dog owners here don’t mess around. Studies show the average dog owner spends over $2,000 a year on their pup. But somehow, most people still waste time and money figuring out which parks are worth the drive and which ones turn into mud swamps every October. That’s why we put together the ultimate guide to Eastside dog parks, so you can skip the trial and error and just enjoy the good stuff.
The Big Three: Marymoor, Luther Burbank, and Beaver Lake
Marymoor Off-Leash Dog Park in Redmond is the crown jewel of Eastside dog parks — and honestly, it might be the best dog park in all of Washington. Locally called “Doggy Disneyland,” Marymoor is best known for its 40-acre off-leash dog area, where dogs can run in open fields, explore wooded trails, and swim in the Sammamish Slough. King County That’s eight times bigger than most neighborhood parks combined.
Luther Burbank Park on Mercer Island is another top pick in this guide to Eastside dog parks. The 77-acre park features two designated off-leash areas — one for large dogs with beach access and a separate smaller section for shy or small dogs. Outdoor Project It’s a beautiful spot. But here’s something the original article got wrong: dogs do NOT swim here year-round. Pets are not allowed at public swimming areas from May 1 to September 30. During the rest of the year, dogs are allowed on the beach but must be leashed at all times. Mercer Island So if you’re planning a summer swim day with your dog, this isn’t the spot. The parking tip still holds — park in the northern lot near the tennis courts to cut your walk to the off-leash area way down.
Beaver Lake Park in Sammamish rounds out the Big Three in any honest Eastside dog park guide. It offers about 2 acres of fenced space plus lake access, and it’s the only major Eastside dog park with zero parking fees. The crowd tip still applies: avoid weekends between noon and 3 PM when large dog playgroups tend to show up.
Water Access: Where Dogs Can Actually Swim
Not every Eastside dog park has legal water access, and the ones that do have rules worth knowing before you drive out there.
At Marymoor, use the north entrance off West Lake Sammamish Parkway for the fastest path to the river. There are five river access points for dogs that like to swim and water retrieve, with over six miles of looping trails throughout the park. Soda
Idylwood Beach Park in Redmond is dog-friendly, but it’s important to set expectations right. Multiple sources confirm dogs must stay on leash at Idylwood and are not allowed on the main swim beach areas. It’s a great place for a leashed walk along Lake Sammamish, but it’s not a dog swim destination.
Newcastle Beach Park has a small dog-friendly area that many people miss. Look for the unmarked trail behind the volleyball courts. Weekday mornings tend to be quiet.
Seasonal Warnings Most Owners Learn Too Late
October through March is mud season. Marymoor’s main field gets soggy fast. Smart owners use the gravel trail loop during those months and always pack two towels minimum.
Summer brings a different problem: toxic algae. King County monitors Beaver Lake and other Eastside lakes for harmful algae blooms that can make people and animals sick — sometimes even in the fall. King County Don’t just look for signs at the park. Check King County’s swim beach status page before any lake visit from July through September. You can even sign up for text alerts when a beach closes or reopens. Not every lake has a bloom every year — Pine Lake had no algal blooms reported for toxin testing in 2024 King County — but it’s always worth checking rather than guessing.
Foxtails are another real danger from May through July. These spiky grass seeds burrow into dogs’ paws and ears and often need a vet to remove. Stick to mowed areas during foxtail season or budget for a vet visit.
Parking Reality Check
Marymoor’s main lots can get very busy, especially on spring or summer weekends. Use the Lot G entrance off Marymoor Way — it adds a short walk but saves you the stress of circling.
Robinswood Park in Bellevue has limited parking that it shares with youth soccer fields. From September through November, weekend visits before 8 AM are your best bet.
Windsor Park in Kirkland is street parking only on 132nd Avenue NE. Get your dog leashed up before you get out of the car, residents notice.
Size Matters: Small Dog Areas
Marymoor’s small dog zone covers about an acre — bigger than some entire dog parks nearby. Jasper’s Dog Park in Issaquah splits its space roughly 70/30 between large and small dogs. The weight limit rule is real: dogs over 25 pounds belong in the main area, even friendly ones. Park volunteers at Marymoor will politely ask you to move.
Bellevue’s Downtown Park gets requests for a dog area every year. The city has consistently said no, so Bellevue dog owners typically make the drive to Marymoor or use the smaller Robinswood space.
Hidden Gems and Local Secrets
Bothell Landing Park is one of the more underrated spots in this Eastside dog park guide. The city has run a pop-up off-leash dog park at Bothell Landing along the Sammamish River, with agility-style features available seasonally. Check the City of Bothell’s parks page for current hours and availability before you go — features and timing can change year to year.
Kirkland’s Heritage Park looks great on paper — waterfront, 10 acres — but the off-leash area sits close to active railroad tracks. Test how your dog reacts to train noise before letting them off-leash here.
Sixty Acres Park in Redmond has no official off-leash area, but the back trails near the Sammamish River Trail are popular for early morning walks. Technically not legal off-leash, so use your judgment.
The Real Cost of “Free” Dog Parks
Entry to all Eastside dog parks is free, but the costs add up fast when you’re a regular visitor. Gas, parking, and post-park dog washing at places like Mud Bay in Redmond can easily run $20+ per visit. Three Marymoor trips a week adds up to real money over a year.
If you’re a frequent Marymoor visitor, consider the annual parking pass. One correction from what you’ll find in other guides: the 1-year parking pass for Marymoor is $100 King County — not $90 as sometimes listed. For twice-weekly visitors, it pays for itself quickly.
Private options like Dogwood Play Park in Sammamish are worth considering too. Their monthly memberships give unlimited visits for a flat fee — do the math based on your schedule.
How to Pick the Right Eastside Dog Park
Your zip code matters a lot here. Redmond and Sammamish residents have the most options nearby. Bellevue and Issaquah dog owners often face a longer drive for the best spots.
Morning visits before 9 AM beat crowds everywhere. Weekday afternoons around 2 PM are great for retirees and remote workers. The 5 PM after-work rush is real — expect more dogs, more energy, and more chaos.
Marymoor stays usable in light rain thanks to its size and drainage. Smaller parks like Windsor turn into mud pits fast. Check the forecast and pick accordingly.
Ready to explore the best Eastside dog parks? Start with the one closest to your home this weekend before 10 AM. Bring cash and quarters for any parking kiosks (most now take ParkMobile too), plus extra towels. Your dog doesn’t care which park you pick — they’re just happy you showed up.
Ready to explore? Start with the park closest to your home this weekend before 10 AM. Bring $5 in mixed bills and quarters for parking, plus extra towels. Your dog will thank you for skipping the usual neighborhood walk.
Ready for more outdoor fun? Check out this post on The Best Eastside Waterfall Hikes.