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Mercer is divided between the arboretum on the west side (the dog friendly side) and the botanic gardens on the west side.
GoPetFriendly User Reviews
Mercer Arboretum & Botanical Garden
22306 Aldine Westfield Road, Humble, TX 77338
This 300-acre preserve allows pets on leashes no longer than six feet on the arboretum trails on the west side of the park. Pets are not allowed in the botanical gardens (the east side) to protect certain plant collections. Pets must be on a 6-foot leash at all times and must be cleaned up after. Seeing-eye and hearing-assistance dogs are allowed throughout both the arboretum and botanic gardens.