A new signature dog-centric event is coming to the Gateway Arch, Jefferson National Expansion Memorial, this Fall. Arch Bark, presented by Royal Canin, will be the first event of its kind at the Arch park and invites St. Louisans along with their furry family members to enjoy the newly renovated park. The free event on Saturday, October 14, celebrates the dog-friendly nature of the expanded Arch park grounds with a variety of activities for dog lovers and their four-legged companions.