Yellowstone National Park is an American national park located in the western United States, largely in the northwest corner of Wyoming and extending into Montana and Idaho. It was established by the 42nd U.S. Congress with the Yellowstone National Park Protection Act and signed into law by President Ulysses S. Grant on March 1, 1872. Yellowstone was the first national park in the U.S. and is also widely held to be the first national park in the world.[10] The park is known for its wildlife and its many geothermal features, especially the Old Faithful geyser, one of its most popular. While it represents many types of biomes, the subalpine forest is the most abundant. It is part of the South Central Rockies forests ecoregion.

Yellowstone National Park spans an area of 3,468.4 sq mi (8,983 km2), comprising lakes, canyons, rivers, and mountain ranges. Yellowstone Lake is one of the largest high-elevation lakes in North America and is centered over the Yellowstone Caldera, the largest supervolcano on the continent. The caldera is considered a dormant volcano. It has erupted with tremendous force several times in the last two million years. Well over half of the world's geysers and hydrothermal features are in Yellowstone, fueled by this ongoing volcanism. Lava flows and rocks from volcanic eruptions cover most of the land area of Yellowstone. The park is the centerpiece of the Greater Yellowstone Ecosystem, the largest remaining nearly-intact ecosystem in the Earth's northern temperate zone. In 1978, Yellowstone was named a UNESCO World Heritage Site.  Source: Wikipedia

Visitor Information
Open all day, every day.  Due to weather conditions park amenities will be limited, please check the NPS website to verify what will be open during your visit.

Weather & Clothing
The weather at Yellowstone is know for its unpredictability.  Please check the weather before you attend the park to be the most prepared.  For clothing, you will always want to have layers with you as the temperature is known to swing.  Rain is very common so packing rain gear is a necessity. 

Activities
Winter Activities: snowshoeing, snowmobile, cross country skiing
Hiking
Wildlife Viewing
Photography
Biking
Horseback Riding
Camping: campground and/or backcountry