Lost wall is located in the Crockford-Pigeon Mountain Wildlife Management Area which requires a license from the state of Georgia to access. You can purchase day or season passes online at gooutdoorsgeorgia.com/ with different prices/options available for residents and non-residents. There is no land access only option which makes the most affordable option the "Combo Hunting / Fishing" license. Rangers do periodically check for permits at the parking lot and you can also purchase licenses via the "Go Outdoors GA App."