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  • Visiting the Gateway Arch: Enter the monument through the Gateway Arch Visitor Center, which faces Fourth Street and the Old Courthouse. The Gateway Arch legs are exits only. Please allow at least 30 minutes to go through security. Tickets sell out early and often, advance reservations are strongly recommended. Pending availability, additional tickets may be available for same-day purchase beginning at 9am each day through our website, call center, and ticket center at the Gateway Arch. Same-day ticket availability is not guaranteed and sells out early and often.

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MonArch Migration Event Logo
September 29, 2018 @ 10:00 am - 1:00 pm Free
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The Great MonArch Migration Event

Monarch butterflies are heading south for the winter, and the National Park Service and the City of St. Louis are celebrating their journey with the Great MonArch Migration Event. At this festive event, pollinator experts from across the region, including the Missouri Botanical Garden, Saint Louis Zoo and the Missouri Department of Conservation, will lead monarch-themed activities, such as offering pollinator crafts and games, making milkweed seed balls and insect hotels, and sharing monarch butterfly gardening tips. Activities will take place in front of the new west entrance to the Gateway Arch, as well as inside the Arch Visitor Center on the mezzanine. Free refreshments, native plants and seed packets are available while supplies last.

More event details can be found on the City of St. Louis’ website.