The marker reads: 

"Since 1920 hundreds of movies and TV episodes, including Gunga Din, How The West Was Won, Khyber Rifles, Bengal Lancers, and High Sierra, along with, The Lone Ranger and Bonanza, with such stars as Tom Mix, Hopalong Cassidy, Roy Rogers, Gary Cooper, Gene Autry, Glen Ford, Humphrey Bogart, and John Wayne, have been filmed in these rugged Alabama Hills with their majestic Sierra Nevada background.  Plaque dedicated by Roy Rogers, whose first starring feature was filmed here in 1933."