YELLOWSTONE NATIONAL PARK, Wyo. (AP) — Starting on Thursday, people can apply for permits to snowmobile in Yellowstone National Park without a commercial guide during the next winter season.

Under a special lottery program, the park allows one group of up to five snowmobiles to enter Yellowstone from each of its four winter entrances per day.

This year’s lottery will be open on the http://www.recreation.gov website until Aug. 31. Successful applicants will be notified in mid-September.

Trips can be for a maximum of three days in length, and permits cost $40 per day with a $6 application fee.