Activities for the 2011/12 winter season begin on Thursday in Grand Teton National Park. The Craig Thomas Discovery and Visitor Center is open year-round from 9:00 am to 5:00 pm daily. Ranger-led 2-hour snowshoe hikes begin December 26 from the visitor center beginning at 1:30 pm each day. Snowshoes are provided for a requested donation of $5 for adults and $2 for children, 8 years or older. Cross-country skiing and snowshoeing are popular winter activities in the park, with most trails skier tracked, but not groomed. The Teton Park Road is designated as a winter trail, open to non-motorized use in winter. Snowmobilers may use the frozen surface of Jackson Lake for the purposes of ice fishing only. A Wyoming State fishing license and appropriate fishing gear must be in possession. On Jackson Lake, snowmobiles must meet National Park Service air and sound emissions requirements for Best Available Technology.