Lost Valley may be:Lost Valley (Antarctica) Lost Valley Scout Reservation, a Boy Scouts of America camp in California Lost Valley Ski Area, in Maine, United States Lost Valley Educational Center, in Oregon, United States "The Lost Valley of Iskander", a short story by Robert E. Howard, published in 1974 Lost Valley (Arkansas), a point near Arkansas Highway 74 Lost Valley (film), a 1997 New Zealand film Coire Gabhail, the Lost Valley or Hidden Valley in Bidean nam Bian in Scotland