paragraph_text: Snowden Bridge is a high-clearance, vertical-lift railroad bridge, built in 1913, that spans the Missouri River between Roosevelt and Richland Counties in Montana, USA, between Bainville and Fairview, Montana, and near Fort Union Trading Post National Historic Site and the ghost town of Mondak near Montana's eastern border with North Dakota. Snowden Bridge is a near twin of the Fairview Bridge, which crosses the Yellowstone River in North Dakota, both bridges having been built by within ten miles of each other over different rivers in different states.

paragraph_text: The Yellowstone Club, also Yellowstone Ski Resort, is a private residential club, ski resort, and golf resort located in the state of Montana, USA. The Rocky Mountain ski and golf club is located in eastern Madison County, just west of Big Sky, Montana, south of Bozeman and northwest of Yellowstone National Park.

paragraph_text: The Gardner River (also known as the Gardiner River) is a tributary of the Yellowstone River, approximately long, in northwestern Wyoming and south central Montana in the United States. The entire river is located within Yellowstone National Park. It rises on the slope of Joseph Peak, Gallatin Range in the northwestern part of the park, and winds southeast through Gardner's Hole, a broad subalpine basin which is a popular trout fishing location. Angling on the Gardner is governed by Yellowstone National Park fishing regulations. After merging with Panther Creek, Indian Creek and Obsidian Creek, it then turns north and flows through a steep canyon where it cuts through a basaltic flow from approximately 500,000 years ago known as Sheepeater Cliffs. Below Sheepeater, Glen Creek out of Golden Gate Canyon and Lava Creek out of Lava Creek Canyon join the Gardner near Mammoth Hot Springs. The river crosses the 45th parallel in Gardner Canyon and is also home to a popular hot spring known as "The Boiling River". The river continues north through Gardner Canyon and empties into the Yellowstone near Gardiner, Montana.

paragraph_text: Midlandvale is a community within the Town of Drumheller, Alberta, Canada. It was previously a hamlet within the former Municipal District of Badlands No. 7 (then Improvement District No. 7) prior to being annexed by Drumheller in 1972. Now referred to as Midland by the Town of Drumheller, the community is located within the Red Deer River valley on North Dinosaur Trail (Highway 838), approximately west of Drumheller's main townsite.

paragraph_text: The Gallatin River is a tributary of the Missouri River, approximately 120 mi (193 km long), in the U.S. states of Wyoming and Montana. It is one of three rivers, along with the Jefferson and Madison, that converge near Three Forks, Montana, to form the Missouri.

paragraph_text: Bankview is a community within the Town of Drumheller, Alberta, Canada. It was previously a hamlet within the former Municipal District of Badlands No. 7 (then Improvement District No. 7) prior to being annexed by Drumheller in 1964. The community is located within the Red Deer River valley to the south of Drumheller's main townsite across Highway 9 (South Railway Avenue).

paragraph_text: Yellowstone National Park spans an area of 3,468.4 square miles (8,983 km), 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 an active volcano. It has erupted with tremendous force several times in the last two million years. Half of the world's geothermal 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.

paragraph_text: Marlo is a small village in the Gippsland region of Victoria, Australia. It is located east near the mouth of the Snowy River where the Snowy River meets and flows into the Southern Ocean.

paragraph_text: Lesterville, Missouri is an unincorporated community in southeast Missouri. It is located in Reynolds County on Routes 21, 49, and 72 near the Black River.

paragraph_text: The Stillwater River is a tributary of the Yellowstone River. Approximately 70 miles (113 km) long, it runs through southern Montana in the United States.

paragraph_text: Brower's Spring is a spring in the Centennial Mountains of Montana that was marked by a surveyor in 1888 as the ultimate headwaters of the Missouri River and thus the fourth longest river in the world, the -long Mississippi-Missouri River.

paragraph_text: The Boulder River is a tributary of the Yellowstone River, approximately 60 mi (96 km) long, in south central Montana in the United States. It is one of two rivers named the Boulder River in Montana.

paragraph_text: The Yellowstone River rises on the continental divide near Younts Peak in Wyoming's Teton Wilderness. It flows north through Yellowstone National Park, enters Montana near Gardiner, and passes through the Paradise Valley to Livingston. It then flows northeasterly across the state through Billings, Miles City, Glendive, and Sidney. The Yellowstone joins the Missouri in North Dakota just east of Fort Union. It is the longest undammed, free-flowing river in the contiguous United States, and drains about a quarter of Montana (36,000 square miles (93,000 km2)).

paragraph_text: The Missouri makes a bend to the southeast as it winds through the Great Plains, receiving the Niobrara River and many smaller tributaries from the southwest. It then proceeds to form the boundary of South Dakota and Nebraska, then after being joined by the James River from the north, forms the Iowa -- Nebraska boundary. At Sioux City the Big Sioux River comes in from the north. The Missouri flows south to the city of Omaha where it receives its longest tributary, the Platte River, from the west. Downstream, it begins to define the Nebraska -- Missouri border, then flows between Missouri and Kansas. The Missouri swings east at Kansas City, where the Kansas River enters from the west, and so on into north - central Missouri. To the east of Kansas City, the Missouri receives, on the left side, the Grand River. It passes south of Columbia and receives the Osage and Gasconade Rivers from the south downstream of Jefferson City. The river then rounds the northern side of St. Louis to join the Mississippi River on the border between Missouri and Illinois.

paragraph_text: The loosely defined term ``supervolcano ''has been used to describe volcanic fields that produce exceptionally large volcanic eruptions. Thus defined, the Yellowstone Supervolcano is the volcanic field which produced the latest three supereruptions from the Yellowstone hotspot; it also produced one additional smaller eruption, thereby creating the West Thumb of Yellowstone Lake 174,000 years ago. The three supereruptions occurred 2.1 million, 1.3 million, and approximately 630,000 years ago, forming the Island Park Caldera, the Henry's Fork Caldera, and Yellowstone calderas, respectively. The Island Park Caldera supereruption (2.1 million years ago), which produced the Huckleberry Ridge Tuff, was the largest, and produced 2,500 times as much ash as the 1980 Mount St. Helens eruption. The next biggest supereruption formed the Yellowstone Caldera (~ 630,000 years ago) and produced the Lava Creek Tuff. The Henry's Fork Caldera (1.2 million years ago) produced the smaller Mesa Falls Tuff, but is the only caldera from the Snake River Plain - Yellowstone hotspot that is plainly visible today.

paragraph_text: The Chief Standing Bear Memorial Bridge is a bridge across the Missouri River at the Nebraska-South Dakota border. Located near Niobrara, Nebraska, not far downstream from the confluence of the Niobrara River with the Missouri, it joins Nebraska Highway 14 to South Dakota Highway 37.

paragraph_text: Waterloo is a community in Lafayette County, Missouri, United States. The community is located in west central Missouri on MO 224, near the south bank of the Missouri River. Nearby towns include Napoleon, Wellington, and Lexington.

paragraph_text: Pike is an unincorporated community in Pike County, Illinois, United States. Pike is located on the Mississippi River and U.S. Route 54 across from the city of Louisiana, Missouri.

paragraph_text: Warren County is a county located in the eastern portion of the U.S. state of Missouri. As of the 2010 census, the population was 32,513. The county is located on the north side of the Missouri River. Its county seat is Warrenton. The county was organized on January 5, 1833, and named for General Joseph Warren, who died in the Battle of Bunker Hill during the American Revolutionary War.Warren County is part of the St. Louis, MO-IL Metropolitan Statistical Area. The county is traversed by Route 94, called the "Missouri Weinstrasse" because of the many vineyards from Marthasville east into St. Charles County. Warren County is also part of the Missouri Rhineland, with award-winning wineries located on both sides of the Missouri River.

paragraph_text: Theodore Roosevelt National Park is a United States National Park comprising three geographically separated areas of badlands in western North Dakota. The park was named for U.S. President Theodore Roosevelt. The park covers 70,446 acres (110.072 sq mi; 28,508 ha; 285.08 km) of land in three sections: the North Unit, the South Unit, and the Elkhorn Ranch Unit.

Question: Where are the Badlands located in the state that the Yellowstone and Missouri rivers meet?
Answer: western North Dakota