In a park that is the size of Switzerland and Yellowstone combined, Wrangell-St. Elias National Park and Preserve in Alaska is the largest National Park in the United States. It is home to nine of the sixteen highest peaks in the United States, the biggest tidewater glacier in North America (Hubbard Glacier), and one of the largest active volcanoes in North America (Mt. Wrangell). With sheer magnitude, this park offers everything imaginable. It is even home to two bison herds that are often considered the most free-ranging herds in the United States: Copper River herd and Chitina River herd.
Bison were reintroduced in Alaska in 1928, when 19 animals from the National Bison Range in Montana were released near the Delta Junction. These 19 animals helped establish the Copper River herd in 1950 and the Chitina River herd in 1962. What is most notable is the first herd was established before Wrangell-St. Elias became a national park in 1980, in fact before Alaska became a state. Today, the herds average between 50-120 individuals. In 2013, the Copper River herd had 156 individuals, the highest number ever recorded.