3D print the Gateway Arch
A free, printable model of the Gateway Arch and the riverfront park, ponds and paths around it, generated from real map data in your browser.
Free, in your browser. Exports a slicer-ready 3MF.
About the Gateway Arch
The Gateway Arch is a monument in St. Louis, Missouri, 192 m (630 ft) tall. Its stainless steel skin covers a weighted catenary arch, the world's tallest, and no other structure in Missouri that visitors can access is taller. Some sources count it as the Western Hemisphere's tallest human-made monument. It honors the westward growth of the nation, is officially dedicated to "the American people," and is commonly called "The Gateway to the West."
Eero Saarinen, a Finnish-American architect, designed the Arch in 1947. Building began on February 12, 1963, and finished on October 28, 1965, for a total cost of $13 million. The public could visit from June 10, 1967. It stands where St. Louis was founded in 1764, on the Mississippi River's west bank.
Civic leader Luther Ely Smith first imagined a riverfront memorial in late 1933, and a nonprofit group, the Jefferson National Expansion Memorial Association, was set up soon after. The idea arose amid the economic hardship of the Great Depression, and the project was expected to employ 5,000 people for three to four years. Today the Arch is a National Historic Landmark within Gateway Arch National Park, a popular tourist destination and a symbol of St. Louis recognized around the world.
How it prints
Make this print opens the generator on a 600 m square around the landmark. Buildings print at close to true scale, so the landmark grows with the print size.
| Print size | Landmark height | Scale |
|---|---|---|
| 160 mm default | 52 mm | 1:3,750 |
| 200 mm | 65 mm | 1:3,000 |
| 256 mm | 83 mm | 1:2,344 |
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North
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East
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South
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West
- One slender, unbraced arch
- The arch is a single narrow curve, so the span near the top needs the most care. Print slowly with good cooling and 0.12 to 0.16 mm layers, and choose a larger print size for wider legs.
- Thin span at the crown
- The arch narrows toward the top. Print friendly adapts that thinnest part to the print scale; Full detail keeps the true proportions on larger prints.
- One piece with the ground
- The Gateway Arch is joined to the ground in the exported file, and the four-side check found no floating parts, so nothing needs gluing.
- Pick the detail for your nozzle
- In the Buildings settings, set Landmark detail to Print friendly to adapt thin parts and small details to the print scale. Full detail keeps every modeled feature, for larger prints or a finer nozzle.
- Colors
- Buildings, roads, water and ground arrive as separate filament slots in the 3MF. The Gateway Arch takes the building color.
- File format
- You get a 3MF for Bambu Studio, OrcaSlicer or PrusaSlicer. Any of them can save it as STL if you need one.
About this model
The Gateway Arch is one of more than 2,300 landmark models in Mini Skyline. They are made with AI, and each one is checked from four sides in its real surroundings before release. Everything around it is built from OpenStreetMap and Overture map data. If you would rather print the shape from map data, turn off Landmark models in the Buildings settings.
Common questions
Is there a Gateway Arch STL I can download?
Mini Skyline builds the file for you in your browser and exports 3MF, which every major slicer opens. If you need an STL, open the 3MF in your slicer and export it from there.
How big can I print it?
Any print size from 40 mm across. The Gateway Arch grows with the print: about 52 mm tall on the default 160 mm print. For a model larger than your printer bed, Project Mode splits the area into tiles.
Is it free?
Yes. Generation runs in your browser, with no account and nothing behind a paywall.
