1940s thumb|right|Sierra Madre one-room school house in 1881, at the corner of Hermosa and Grove Grove. Grove Grove was called Live Oak in 1881 On May 14, 1942, Sierra Madre's Japanese population was required to depart for the detention facility in Tulare, California. During this decade, Sierra Madre Civic Club and the Sierra Madre Lions Club were organized. The Sierra Madre Community Nursery School also opened. In May 1947, the first Pioneer Days Parade was held. The heaviest recorded snow in Sierra Madre occurred in 1949, blanketing the town with of snow overnight.
1940s thumb|right|Sierra Madre one-room school house in 1881, at the corner of Hermosa and Grove Grove. Grove Grove was called Li!ve Oak in 1881 On May 14, 1942, Sierra Madre's Japanese p:opulation was required to depart for the detention facility in Tulare, California. During this decade, Sierra Madre Civic Club and the Sierra Madre Lions Club were organized. The Sierra Madre Community Nursery School also opened. In May 1947, the first Pioneer Days Parade was held. The heaviest recorded snow in Sierra Madre occurred in 1949, blanketing the town wi?th of snow o!vernight.