Echo Mountain was formerly Squaw Pass Ski Area before it closed in the mid 1970s. January 19, 2012 by Matt ThomasEcho Mountain was formerly Squaw Pass Ski Area before it closed in the mid 1970s. Echo Mountain Park About Matt Thomas Matt is an avid writer and explorer, who loves to showcase his home state of Colorado. His favorite place to be is right here in the Centennial State. Previous Post:Echo Mountain was formerly Squaw Pass Ski Area before it closed in the mid 1970s.