Doors Open Denver is the one weekend a year when the city’s architecture is the event: office lobbies, historic churches, design firms and civic buildings open their doors, and architects and planners give tours and talks. The 2026 edition runs Thursday, Sept. 24 through Sunday, Sept. 27, with 41 participating sites and a ‘Destination Downtown’ theme built around downtown architecture, urban planning and public space.
The Denver Architecture Foundation lists ticketed events (expert-led tours, lectures and panels) alongside the site list, so check both before you plan a route. Participating sites include the American Museum of Western Art and a mix of historic churches, architecture offices and cultural institutions. One example we verified separately: the Denver Firefighters Museum is free during Doors Open Denver on Sept. 25-26.
Know before you go
- Sept. 24-27, downtown Denver and nearby neighborhoods; hours vary by site.
- Ticketed tours and talks are sold through the foundation’s site; pricing was not published on the overview page.
- Good with older kids and teens who like buildings; pair it with the free State Capitol tour.
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