Aerial view · USGS, public domain
Grass Island Dog Park
Grass Island Dog Park is a fenced dog park (free entry) at Grass Island Rd, Greenwich, CT 06830. Open dawn - dusk. Has a separate small-dog area.
Address
Grass Island Rd, Greenwich, CT 06830, USA
Hours
dawn - dusk
Price
Free Entry
About the Park
Grass Island Dog Park is a 3/4-acre fenced-in off-leash area with separate sections for small and large dogs, running water, bowls, and a dog walking trail. It features waste bag dispensers, benches, and scenic views of Greenwich Harbor, though it's near a wastewater treatment plant. Ample parking is available near the white 'Dog Park' sign on Grass Island Rd.
infoWhat to Know Before You Go
Grass Island Dog Park is fully fenced, so your dog can run and play off-leash without worry. This makes it a great choice for dogs still working on recall or for owners who want extra peace of mind.
There's a separate area for small dogs, which is perfect if you have a smaller breed that might be intimidated by larger dogs. This is a feature many dog owners specifically look for.
Dogs can enjoy water features here — great for cooling off on hot days. Bring a towel for the car ride home, because your pup will probably get soaked.
Walking trails are available, so you and your dog can enjoy a walk beyond just the off-leash area. Trails are a great option for dogs who enjoy sniffing and exploring at their own pace.
Best of all, Grass Island Dog Park is completely free to visit — no membership or daily fees required.
backpackWhat to Bring
Fresh water and a bowl
Even parks with water fountains can have them out of service. Bring your own to be safe.
Poop bags
Most parks provide them, but don't rely on it. Always come prepared to clean up after your dog.
A towel
Your dog will likely get wet at the water features. Save your car seats with a quick dry-off.
A reflective collar or light-up leash
If you visit near dusk, visibility gear helps you keep track of your dog and stay safe.
High-value treats
Useful for practicing recall in a distracting environment and rewarding good social behavior.
Your dog's favorite toy
A familiar toy can help shy dogs feel more comfortable and give them something to focus on.
Recommended Gear
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Chuckit! Amphibious Bumper Floating Fetch Toy
Hi Kiss 30ft Recall Training Long Lead
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Location
Note: Dogs in heat prohibited; no smoking or food allowed; pick up waste; aggressive dogs not permitted and must be leashed/removed; owners must stay with dogs, carry leashes; children 10 and under not allowed inside fence; children 10-16 must be supervised; max 2 dogs per person; recommended max 20 dogs at once.
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helpFrequently Asked Questions
Is Grass Island Dog Park fenced?
Yes, Grass Island Dog Park is a fenced dog park, providing a safe enclosed area for off-leash play.
Is Grass Island Dog Park free?
Yes, Grass Island Dog Park is a free public dog park open to all visitors.
What are the hours for Grass Island Dog Park?
Grass Island Dog Park is open dawn - dusk. Hours may vary on holidays — check locally for updates.
Does Grass Island Dog Park have a separate area for small dogs?
Yes, Grass Island Dog Park has a separate area designated for small dogs.
Does Grass Island Dog Park have water features?
Yes, Grass Island Dog Park offers water features or water access for dogs to cool off and play.
Where is Grass Island Dog Park located?
Grass Island Dog Park is located at Grass Island Rd, Greenwich, CT 06830, USA in Greenwich, CT 06830.
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Claim it nowLast updated June 2026 · How we source park data