Aerial view · USGS, public domain
Grist Mill Dog Park
Grist Mill Dog Park is a fenced dog park (free entry) at Mt Zephyr Park, 4710 Mount Vernon Memorial Hwy, Alexandria, VA 22309. Open 8:00 AM - 8:00 PM.
Address
Mt Zephyr Park, 4710 Mount Vernon Memorial Hwy, Alexandria, VA 22309, USA
Hours
8:00 AM - 8:00 PM
Price
Free Entry
About the Park
A water pump with kiddie pools is the standout at Grist Mill Dog Park, a fully fenced off-leash area at Mt Zephyr Park, 4710 Mount Vernon Memorial Hwy in the 22309 zip south of Alexandria. On muggy Northern Virginia summer days, those pools earn their keep. The run is gravel-surfaced and operated as a free public facility through Fairfax County's off-leash program, open 8 a.m. to 8 p.m. daily. Shade trees, benches, picnic tables, and waste stations round out the amenities, so you can settle in for a longer session. The location along the Mount Vernon Memorial Highway makes it an easy add-on to a trip toward George Washington's Mount Vernon estate.
infoWhat to Know Before You Go
Grist Mill 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.
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.
Best of all, Grist Mill 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
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Location
Note: Pick up after dogs, repair holes, control barking; bring your own poop bags; supervise dogs closely; single entrance/exit.
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helpFrequently Asked Questions
Is Grist Mill Dog Park fenced?
Yes, Grist Mill Dog Park is a fenced dog park, providing a safe enclosed area for off-leash play.
Is Grist Mill Dog Park free?
Yes, Grist Mill Dog Park is a free public dog park open to all visitors.
What are the hours for Grist Mill Dog Park?
Grist Mill Dog Park is open 8:00 AM - 8:00 PM. Hours may vary on holidays — check locally for updates.
Does Grist Mill Dog Park have a separate area for small dogs?
Grist Mill Dog Park does not have a specifically marked small dog area. All dogs share the same space.
Does Grist Mill Dog Park have water features?
Yes, Grist Mill Dog Park offers water features or water access for dogs to cool off and play.
Where is Grist Mill Dog Park located?
Grist Mill Dog Park is located at Mt Zephyr Park, 4710 Mount Vernon Memorial Hwy, Alexandria, VA 22309, USA in Alexandria, VA 22309.
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Claim it nowLast updated June 2026 · How we source park data