The public may already have realized this, because the number of annual visitors to the park peaked in 1992 and has remained fairly stable since then. Yellowstone National Park is accessible in summer at five entrances. Some routes to Yellowstone cross mountain passes, so it's wise to have vehicles in good condition. All roads in the park are open from mid-April through October. In the wintertime, most roads are closed, but snow machines are available to take visitors to Old Faithful and some other attractions in the park.
Several roads are open to snowmobilers, and snowmobiles can be rented in the area.
Because much of the road system will be rebuilt in the next few years, it's best to check ahead about which roads are being repaired. Entrance permit is good for seven consecutive days in Yellowstone and Grand Teton national parks. Getting organized Yellowstone Park has five centers where visitor services, gift shops, gas stations and accommodations are clustered. Mammoth Hot Springs in the northwest. Yellowstone Lake in the southeast.