The park and museum commemorate the Donner Party, westward-bound pioneers—about 90; historians debate the exact number—who became trapped in the Sierra in the winter of 1846–47 in snow 22 feet deep. Barely more than half the pioneers survived, some by resorting to cannibalism. The Emigrant Trail Museum details the Donner Party's plight, and other displays explain railroad development through the Sierra. In the park, you can picnic, hike, camp, and go boating, fishing, and waterskiing in summer; winter brings cross-country skiing and snowshoeing on groomed trails. Slated for a 2015 debut, a new High Sierra Crossing Museum will contain exhibits about the Donner Party, regional Native Americans, and railroad and transportation development through Donner Pass.