The Museum of the San Fernando Valley is the at the idea stage. For now there's the Historic North Hollywood Tour. Meet at the statue of Amelia Earhart (a one-time Valley resident) at the the North Hollywood Recreation Center
where historian Richard Hilton leads walkers on a two-and-a-half hour trip replete with tales of long-gone ranchers (Lankershim was a busy guy).
Best of LA May 2013
"Do Walking Tours - Ramble around town - and through history - with your feet as your engine - by Kari Mozina.
"It may be an odd assertion to make about a city so closely associated with the automobile, but of the most revelatory was to experience LA is on foot. ... Clip on the pedometer, grab a water bottle, and lace up your sneakers to travel across the cityscape and back to another era."