Yes, with restrictions. Dogs are not permitted in the water at Lake Hennessy, the City of Napa's drinking water.
| Dogs allowed | Yes, with restrictions |
|---|---|
| Official restrictions | Dogs are not permitted in the water at Lake Hennessy, the City of Napa's drinking water. |
| Leash | Required |
Verified November 1, 2026 from Napa County Regional Park and Open Space District. Full record and sources on DogPolicies.