2026 Doors Open California
75+ Sites Across the State | Weekends in September, 2026
Doors Open California is the largest statewide celebration of historic places in California. Enthusiasts of historic architecture, design, and cultural heritage will have access to over 75 sites across the state on the weekends during the month of September 2026.
Registration will open early 2026!
Register
Registration Details
Registration will open in early 2026!
Registration Form
Doors Open California is the largest statewide celebration of historic places in California. Enthusiasts of historic architecture, design, and cultural heritage will have access to over 70 sites across the state on the weekends during the month of September 2025.
What Your Registration Includes
Your Doors Open California registration fee of just $20 includes the following exciting perks.
- Complete access to more than 70 sites across the state of California in six regions
- A Doors Open wrist bracelet, giving you access to all sites on the weekend
- Access to our special Doors Open California virtual map of participating sites
- Self-guided and virtual tours made available from Doors Open partners
- Special experiences and unique curated content, accessible only to Doors Open participants.
Sites & Schedule
We will post a full roster of sites in early 2026. More than 70 sites on weekends in the month of September are planned for Doors Open. With your registration, you have access to as many as you can attend.
Sponsorship & Media Kits
Sponsorship and Media Details
Sponsorship
Sponsorship provides significant marketing exposure at key Doors Open events. To become a sponsor, you can select the option below or visit californiapreservation.org/doca/sponsor/
Media Details
The California Preservation Foundation invites media professionals to cover the 5th Annual Doors Open California, a unique statewide event offering behind-the-scenes access to over 70 historic sites every weekend in September 2026. For more details, contact Jon Haeber at jon@californiapreservation.org or (415) 495-0349 x201.
Media Information & Press Kits
We’ve provided some downloadable resources and social media promotional tools for you to help spread the word about Doors Open California! Media inquiries can be directed to cpf@californiapreservation.org or by dialing 415.495.0349.
Sponsorship Information
Doors Open California is a signature statewide event that draws over 1,000 participants who will get rare & special access to amazing architecture and hidden histories weekends in September. As a sponsor, you will be highlighted as a supporter of the largest statewide celebration of historic places. Walking tours, hidden vaults of local museums, inaccessible areas of historic buildings, or enlightening stories – it’s a chance to experience history first-hand. Over 70 amazing places in California will be highlighted.
Our Sponsors are invited to join us in supporting our third-ever Doors Open California event, where local, nonprofit, government, and enterprise partners will showcase sites in 50+ distinct cities in all corners of California.
BECOME A DOORS OPEN SPONSOR
Click here or on the thumbnail below for the 2025 sponsorship brochure
Partnership Information
Doors Open California Partners are critical to making this event creative, inclusive, and compelling. Partners could be nonprofit organizations, firms, local governments, educational institutions, museums, property owners, or anyone interested in sharing a special, unique place in their community that is worth recognizing and protecting.
Partners create or provide access to places that typically aren’t accessed by the public, and they may share histories that aren’t typically told. Partners, in turn, tap into CPF’s international audience of more than 40,000 supporters and followers. Partners may also solicit Doors Open attendees to support their own efforts – as volunteers, donors, or other types of supporters.
Ways to Partner with Doors Open…
Submit a Proposal for Doors Open 2027
We would love to hear your ideas! This simple form is meant to be completed in less than five minutes. For full details, visit: https://californiapreservation.org/doca/ideas/
Sign Up as an Affiliated Local Business
Local businesses near Doors Open Sites can choose to sponsor Doors Open – or, if they’d like to be included on participant itineraries, they can offer a special discount or gift to registered Doors Open participants wielding a wrist band.
General Information
The California Preservation Foundation announces the 5th Annual Doors Open California, offering exclusive behind-the-scenes tours of historic places statewide. Spanning September weekends, the event features over 70 unique sites, including hidden museum vaults and inaccessible historic buildings. For a $20 flat fee, attendees gain rare access to preserved architecture and enlightening stories across various cities. Some museums will offer free entry. All sites will be posted in early 2026.
We Thank Our Generous Sponsors
Interactive Map of Participating Sites for 2025
DRAFT MAP – SUBJECT TO CHANGE
View the full-screen interactive map here