If you're searching for dog parks in Naperville, IL, the real answer is three forest preserve off-leash areas inside the city — Whalon Lake in the south, Springbrook Prairie in the southwest, and Greene Valley in the east — plus one more a short drive north in Warrenville. All of them are permit parks, and Naperville straddles two counties, so which permit you need depends on which park you pick. Last updated October 14, 2026.
The biggest off-leash option in Naperville: 11.9 fenced acres with a separate 1.9-acre enclosure for dogs under 35 pounds, plus parking and a water fountain. The surrounding preserve adds an 80-acre lake and a paved DuPage River Trail segment for a leashed cool-down walk afterwards.
The off-leash area sits inside the 1,829-acre Springbrook Prairie preserve, one of the largest grasslands in DuPage County and a well-known birding site. Come for the dog park, stay for the long prairie trails — dogs must be leashed everywhere outside the fenced area, including the parking lot.
Greene Valley's off-leash area serves the east side of the city, with its own parking lot on the east side of Greene Road, south of Hobson Road. The wider preserve is known for its trails and its 190-foot scenic overlook, open on May–October weekends in past seasons — confirm current overlook hours with the District before planning around it.
Not in Naperville, but close enough to matter for north-side residents: Blackwell Forest Preserve in Warrenville has an off-leash area reached from Mack Road, east of Route 59. It uses the same DuPage County permit as Springbrook Prairie and Greene Valley, so one DuPage permit covers all three.
This is the part that trips up new dog owners here: south Naperville is Will County and the rest is DuPage County, and each forest preserve district runs its own permit.
Pair this guide with our Naperville Riverwalk guide for leashed downtown walks, and the Naperville events page for pet-friendly community events.
Yes, for the forest preserve off-leash areas. Springbrook Prairie and Greene Valley require a Forest Preserve District of DuPage County off-leash permit; Whalon Lake requires a separate Forest Preserve District of Will County permit. The two systems do not cover each other.
Whalon Lake, at 1480 Royce Road: 11.9 fenced acres including a separate 1.9-acre area for dogs under 35 pounds, inside a 249-acre preserve around an 80-acre lake.
For the 2026 permit year, Will County reported $40 for Will County residents and $80 for nonresidents for an annual permit, with $5 daily passes and discounts for seniors, veterans and active-duty military. Confirm the current price with the District before buying — fees change by year.
Carry your permit; up to three dogs per person; dogs at least 4 months old and current on distemper, parvo and rabies vaccinations with tags worn; keep your dog in view and under control; leash outside the area; and pick up all waste. Areas may close periodically for maintenance.
Anywhere leashed walks are allowed — no off-leash permit is needed. Leashed dogs are welcome on the Naperville Riverwalk, and the trails at Whalon Lake, Springbrook Prairie and Greene Valley work well for leashed walks outside the fenced areas.