Visit from 10 am to 1 pm on Mondays and Fridays.
Email us for an appointment on other days.
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.
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.