Serving Altadena since 1935
The Altadena Historical Society (AHS) was founded in 1935. As a 501(c)3 organization, we gather, preserve, and share print and digital information about the people, places, and events that have shaped the Altadena community.

Announcing a new edition of our award-winning book!
The Altadena Historical Society has published a new commemorative edition of “Altadena: Between Wilderness and City” by Michele Zack. Available mid-December.
Learn about our new oral history project
Save the date: December 14
AHS members are invited a festive holiday party to celebrate the season and the launch of the new edition of Altadena: Between Wilderness and City.
Admission is free for current AHS members who RSVP online. Tickets are available at the door for $25.


Events
Visit our Programs page for upcoming events. Subscribe to our email list to stay in the loop.

Research requests
Wondering about the history of your house? Or a notable person from Altadena’s past? Just ask us.

In the Archives
We have thousands of printed items related to the history of Altadena. Visit this page for details.

A slice of history
See “Fourteen Decades of Altadena History 1883-2017” at the Altadena Community Center.

Travel to the past
The Disneyland of its day, the Mount Lowe Railway drew visitors from around the world.

Honoring a hero
We celebrated the life of activist Ellen Garrison Clark—and purchased a headstone for her grave.