We stayed for almost a week and enjoyed our time in Marathon. The first night we enjoyed looking at the stars with the resident astronomer. The rest of the week we stayed cozy in our warm RV at night as it got really cold! The stars were truly spectacular, but too cold for me. During the day we explored Big Bend, which was convenient to access from the RV park. The only reason we give four stars and not five was the difficult to use laundry room, and the train next to the park.