paragraph_text: By 1988, Walmart was operating in 27 states, having expanded into Arizona, Michigan, Ohio, West Virginia, New Jersey, and Wyoming. By 1990, they expanded into California (which marked Walmart officially becoming a fully nationwide retailer), Nevada, North Dakota, Pennsylvania, South Dakota, and Utah. The Walmart Visitor's Center also opened this year on the site of Sam Walton's original store.

paragraph_text: Olympic Valley, California (also known as Squaw Valley) is an unincorporated community located in Placer County northwest of Tahoe City along California State Highway 89 on the banks of the Truckee River near Lake Tahoe. It is home to Squaw Valley Ski Resort, the site of the 1960 Winter Olympics. Olympic Valley is the smallest resort area to host the Olympic Winter Games.

paragraph_text: The company was founded by Chicago - born George Cohon. The first store opened in 1967 as the Western Canadian franchisee and operated with the U.S. operations. Cohon was the Eastern Canadian franchise and opened his store in 1968 on Oxford Street West in London, Ontario. In 1971, Cohon merged the two operations to one national operation. Cohon was responsible for developing the eastern Canadian franchises. The first McDonald's restaurant in Canada was opened in 1967 in Richmond, British Columbia, by western franchise owners. It was also the first McDonald's restaurant outside of the United States. As of 2014, McDonald's Canada had 1,400 stores (including Walmart Canada locations) in Canada, and more than 85,000 Canadian employees.

paragraph_text: Whitewater Ski Resort is a ski resort located a 25-minute drive from Nelson in southern British Columbia, Canada. The resort is situated in Ymir bowl, beneath the high Ymir Mountain, in the Selkirk Mountains. The Selkirks receive plentiful, dry snow, and the location in a high alpine bowl provides an annual snowfall average of approximately . The elevation of the parking lot is and the highest lift accessed point is . While Ymir Peak is not included within the ski area boundary, lifts climb both shoulders of the bowl and provide easy traverse routes along ridges to the top. In addition to its snow, the resort is renowned for its tree skiing and steep runs; only 20% of the runs are beginner, while 40% are intermediate and the remaining 40% are advanced. Areas surrounding Whitewater, including West Arm Provincial Park, are renowned for easy access for backcountry split boarding and ski touring.

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: Granite Gorge is a small downhill ski resort in southwest New Hampshire, United States. It is located on Pinnacle Mountain in the town of Roxbury, east of downtown Keene on New Hampshire Route 9. The resort is the reincarnation of the former Pinnacle Peak Ski Area, which operated from 1959 to 1977.

paragraph_text: Kulinoto is a ski resort in the northern Pirin Mountains of Bulgaria. Located at 1400 metres above sea level, it is located 12 kilometres from the town of Razlog and 20 kilometers from the ski resort Bansko.

paragraph_text: In 1991, the company expanded into Connecticut, Delaware, Maine, Maryland, Massachusetts, New Hampshire, and New York. Walmart expanded worldwide this year, with the opening of their first store outside the United States in Mexico City. They also acquired Western Merchandisers, Inc. of Amarillo, Texas. 1991 also saw the launch of the Sam's American Choice brand of products.

paragraph_text: Masella, belonging to Alp's municipality, is a ski resort in La Cerdanya in Girona, Catalunya in the Spanish Pyrenees. It is situated on "Tosa d'Alp" mountain. This ski resort is part of the Alp 2500 resort.

paragraph_text: Laurent Chappis (8 May 1915 – 28 December 2013) was an architect and town planner, born in Aix-les-Bains, France. He created the French ski resort of Courchevel located in the Trois Vallées and in doing so practically wrote the rule book on how to design a ski resort. Chappis was a keen ski tourer exploring the mountains around Grenoble in the 1930s before joining the army and serving in the early stages of World War II. A decorated war hero he was captured in an attack on a German position in the final days before the French surrender and served five years in a PoW camp in Austria.

paragraph_text: Searchmont Resort is a ski resort located in the community of Searchmont, Ontario, Canada, and mainly caters to residents of Sault Ste. Marie, Ontario and Algoma, which is 45 minutes away. The area has a 750 vertical foot drop, featuring 18 runs and four chair lifts (one quad, one triple, one double, and one beginner poma lift).

paragraph_text: Mount Sunapee Resort is a ski area and resort located in Mount Sunapee State Park in Newbury, New Hampshire, United States.

paragraph_text: Vallter 2000 is a ski resort located in the Vallter valley, close to Setcases, Girona, Catalonia (Spain). The resort has an alpine ski area that extends from .

paragraph_text: Mont Rogneux is a mountain of the Swiss Pennine Alps, overlooking Liddes in the canton of Valais. It is a mountain located north of the Petit Combin and Grand Combin. Facing the Verbier ski resort and neighbouring the Bruson lifts, it presents a steep north face which has not yet been descended by ski.

paragraph_text: Mad River Mountain is a ski and snowboard resort in Valley Hi, Ohio, United States. The elevation of Mad River Mountain is with a vertical drop of , and it has a ski season that runs from December 1 through March 16. The resort, which opened in 1962, as Valley Hi Ski Area, is owned and operated by Peak Resorts.

paragraph_text: Wisp Resort is the only four-season downhill ski resort in Maryland. It is located near Deep Creek Lake in the town of McHenry in Garrett County, Maryland, near the border of West Virginia and Western Pennsylvania/Pittsburgh Metropolitan Area. It is located 32 miles from Cumberland, Maryland, 2 hours from Pittsburgh, and 3 hours from Baltimore and Washington, DC. The ski slopes are located on Marsh Mountain. Wisp Resort was founded by Mr.Helmuth M.G. Heise and is currently owned by Pacific Group Resorts, Inc.

paragraph_text: Moose Mountain is a peak in the Sawtooth Mountains of northeastern Minnesota in the United States. Its elevation is 1689 feet (515 meters) above sea level. Located close to Lake Superior and reaching 1087 feet (331 m) above its waters, it is part of the Lutsen Mountains ski resort.

paragraph_text: Blue Cow is a ski resort that is part of Perisher located in the Snowy Mountains of New South Wales, Australia, within the Snowy Monaro Regional Council. The resort is situated within the Kosciuszko National Park and is administered by the NSW National Parks & Wildlife Service. During winter months, the only access to the village is via the Skitube underground railway. In summer, access is via off-road only. Blue Cow is one of the four resort bases within Perisher, Australia's largest ski resort.

paragraph_text: Killington is a town in Rutland County, Vermont, United States. The population was 811 at the 2010 census. Killington Ski Resort and numerous vacation lodges are located here. The town was previously named Sherburne, but was renamed to its original name, "Killington", in 1999.

paragraph_text: During spring 2009, Fernie Alpine Resort was transformed into the fictional Kodiak Valley ski resort, circa 1986, for exterior location shots of the Hollywood film Hot Tub Time Machine. The film was released in March 2010.

Question: When did the first Walmart open the the state where Wisp Ski Resort is located?
Answer: 1991