The Los Altos History Museum (LAHM) is a museum in Los Altos, California. Founded in 2001,^[1] the museum showcases the history of Los Altos and surrounding areas, including the transformation of the agricultural paradise once known as the "Valley of Heart's Delight" into the high-tech Silicon Valley. The Los Altos History Museum is situated in one of the few remaining apricot orchards in the San Francisco Bay area.^[2]

The museum features both a permanent exhibit as well as temporary exhibits. The permanent exhibit is called "Crown of the Peninsula"^[2] and describes the history of the city of Los Altos, featuring a diorama of Los Altos as it appeared in 1932 with an operational O-scale model train representing the rail line through town that was removed in 1964 and replaced by Foothill Expressway.^[3]