displaying a self-certification of compliance on the dashboard of any vehicle attached to an empty boat trailer. Grand Teton National Park fisheries are managed by the Wyoming Fish and Game Department and a Wyoming state fishing license is required to fish all waterways in Grand Teton National Park. The creel limit for trout is restricted to six per day, including no more than three cutthroat trout with none longer than , while the maximum length of other trout species may not exceed , except those taken from Jackson Lake, where the maximum allowable length is . There are also restrictions as to the seasonal accessibility to certain areas as well as the types of bait and fishing tackle permitted. Winter activities Visitors are allowed to snowshoe and do cross-country skiing and are not restricted to trails. The Teton Park Road between the Taggart Lake trailhead to Signal Mountain Campground is closed to vehicular traffic during the winter and this section of the road is groomed for skiing and snowshoeing traffic. The park service offers guided snowshoe tours daily from the main headquarters located in Moose, Wyoming. Overnight camping is allowed in the winter in the backcountry with a permit and visitors should inquire about avalanche dangers. The only location in Grand Teton National Park where snowmobiles are permitted is on Jackson Lake. The National Park Service requires that all snowmobiles use "Best Available Technology" (BAT) and lists various models of snowmobiles that are permitted, all of which are deemed to provide the least amount of air pollution and maximize noise abatement. All snowmobiles must be less than 10 years old and have odometer readings of less than . Additionally, snowmobile use is for the purposes of accessing ice fishing locations only. Snowmobile access was permitted between Moran Junction and Flagg Ranch adjacent to the John D. Rockefeller Jr. Memorial Parkway so that travelers using the Continental Divide Snowmobile Trail could traverse between Bridger-Teton National Forest and Yellowstone National Park. However, in 2009, winter use planners closed this since unguided snowmobile access into Yellowstone National Park was also discontinued. Tourism Visitor centers The Craig Thomas Discovery and Visitor Center adjacent to the park headquarters at Moose, Wyoming, is open year-round. Opened in 2007 to replace an old, inadequate visitor center, the facility is named for the late U.S. Senator Craig Thomas and designed by acclaimed architect, Bohlin Cywinski Jackson. It was