Land of the Lost is a ten to fifteen minute hike from Little Lebowksi and the Ampitheater. It is easy enough to get lost trying to get there the first time. My recommendations are to hike down past the Guardian and trend left and down till you enter the burned area. From there you should be able to see the backside of the crag. Keep hiking and scrambling downhill and you will find it eventually. Alternatively, you can walk from the Little Lebowski by walking out the back of the area, down the creek bed and then continuing downhill for ten to fifteen minutes going left when possible.