It was my first NM mule deer muzzle loader hunt in the Jicarilla Mountains. I had just left camp for the evening hunt. I walked about 1/4 mile down a hill and across a dirt road to climb over another hill into the land I intended to hunt. I was maybe 150 yards form the road when I heard the exhaust of an old truck moving up the road. I was on public land wearing full natural gear camo with no blaze orange (my own dumb fault). I knew that I could have possibly been mistaken for a NM mulie with the amount of grey I was sporting, so I sat down to wait for the truck to drive by before continuing up the hill. Then the truck came to a stop maybe about another 50 yards further down the road from where I was sitting. After the truck had stopped for about 30 sec the passenger fired a shot out of the window though the sparse timber on the hill side. I could see the entire hill through the open timber and there wasn't a single live animal other than myself on that hill. I heard the bullet as it smacked into a tree about the same elevation as I was sitting. Then I heard the shooter say "it must have been nothing”. After the truck moved off I went back to camp and put on a pair of jeans and a white long-sleeved tee for the rest of that day, and drove into town for an orange hat that night. Let this be a lesson to all public land hunters.