Tony report this to the rangers. If it is natural gas and you can smell it some other type of gas is with it. Also natural gas is lighter than air so unless there is no air flow and it can be contained it should go up and not be a major hazard. If some form of gas is going down it is not just natural gas. Old firefighter rule natural gas goes up, propane goes down and enough of either one can kill you. Since you don't have propane someone better find out what it is.