Question: The Flathead Valley, located in Northwestern Montana has been made a major resort destination due to its proximity to a ski resort located at which mountain?

Context paragraphs:
Mount Bachelor ski area: Mount Bachelor ski resort is a ski resort located in central Oregon, approximately 22 mi west of Bend, along the Century Drive Highway.  The ski runs are on the northern face of Mount Bachelor, a stratovolcano built atop a volcanic shield in the Cascade Range.  Since 2001, the ski area has been owned by Powdr Corporation of Park City, Utah.  It is the largest ski resort (by area) by more than 1000 acre in Oregon, the second largest single-mountain ski resort in the U.S., behind Vail, and the sixth largest of all ski resorts in the nation.

Brighton Ski Resort: Brighton Ski Resort is a ski area located in Big Cottonwood Canyon, 30 mi from downtown Salt Lake City, Utah.  It is owned by CNL Lifestyle Properties and operated by Boyne Resorts.  Brighton Ski Resort was the first ski resort in Utah, and one of the first in the United States.  Brighton was started in 1936 when members of the Alpine Ski Club built a rope tow from wire and an old elevator motor.  The resort was named for Thomas W. Brighton, who is credited with constructing the first buildings in the area.  Brighton claims to be a "no-frills" resort whose sole business is to provide skiers and snowboarders with top-notch trails.  While it does provide lodging, dining, and shopping, the extent of the facilities does not make Brighton what is typically seen as a destination ski resort.  Most Brighton skiers and riders are Utah locals.  Most visitors do not stay at Brighton-run lodging; many visitors stay in the greater Salt Lake area, many of whom also plan trips to other area ski resorts.

Ludlow Mountain: Ludlow Mountain is a mountain located in Ludlow, Vermont.  Okemo Mountain Resort is a ski resort located on Ludlow Mountain.  Before becoming a popular ski resort destination, Ludlow was originally a mill town, and was the home of a General Electric plant until 1977.

Whitefish Mountain Resort: Whitefish Mountain Resort is a ski resort located at The Big Mountain in northwestern Montana, located west of Glacier National Park in the Flathead National Forest.  It is 4 miles (6 km) from the town of Whitefish and 21 miles (34 km) north of the city of Kalispell.

Vail Resorts: Vail Resorts, Inc. runs four ski resorts in Colorado (Vail Ski Resort, Beaver Creek Resort, Keystone Resort, and Breckenridge Ski Resort), three in Lake Tahoe (Heavenly Mountain Resort, Kirkwood Mountain Resort, Northstar California), one in Utah (Park City Mountain Resort in Park City), one in Vermont (Stowe Mountain Resort), one in Minnesota (Afton Alps), one in Michigan (Mount Brighton), one in Wisconsin (Wilmot Mountain), one in New South Wales, Australia (Perisher Ski Resort), one in British Columbia (Whistler Blackcomb), and a summer resort in Wyoming.  They also own luxury resort hotels throughout the world.  The company trades on the New York Stock Exchange, symbol MTN.  The company is headquartered in Broomfield, Colorado.

Winterplace Ski Resort: Winterplace Ski Resort is a ski resort located in Ghent, West Virginia on Raleigh County's Flat Top Mountain.  The southernmost ski resort in West Virginia, Winterplace is a popular attraction due to its proximity to Interstate 77.  It operates in conjunction with "The Resort at Glade Springs", a four season golf resort and spa.

Flathead Valley: The Flathead Valley, located in Northwestern Montana, is a region of the U.S. state of Montana.  It includes Flathead County, and part of Lake County.  Notable towns include Bigfork, Kalispell, Columbia Falls, Polson, and Whitefish.  The geography of the Flathead roughly corresponds to the valley where Flathead Lake is located.  In addition to the lake, the area's proximity to attractions such as Glacier National Park and Whitefish Mountain Resort have made the area a major resort destination.  Many outdoor activities can be pursued there such as hiking, backpacking, rafting, canoeing, skiing, hunting, and some of the best trout fishing in the world.  The Flathead Valley is also home to a portion of the Flathead Indian Reservation.

Okemo Mountain: Okemo Mountain Resort is a ski resort located in the town of Ludlow, Vermont, United States.  Before becoming a popular ski resort destination, Ludlow was originally a mill town, and was the home of a General Electric plant until 1977.  The resort experienced 600,000 skier visits in 2009.  Parents Magazine rated it the Top US Family Snow Resort.

Crystal Mountain (British Columbia): Crystal Mountain Resort was a small day-use ski area near West Kelowna, British Columbia, Canada.  It has two chairlifts and one surface lift: a GMD Mueller doublechair, a Leitner-Poma triplechair, and a Doppelmayr T-bar.  The ski area has 30 designated groomed runs and the resort also has many different tree trails and some glades.  Despite the smaller size of the resort, which is considerably smaller than neighbouring resorts such as Big White Ski Resort and Silver Star Mountain Resort, the mountain is of good size and is a popular destination for both experienced and first-time skiers, snowboarders and snowshoers.  Despite the lower elevation, the resort receives heavy snowfall each year with many powder days throughout the winter season.  It was long known as Last Mountain Ski Resort but has since changed its name to Crystal Mountain Resort in 1992.  Crystal Mountain Resort offers lessons for skiing and snowboarding as well as offering rentals for snowshoeing.  It has not been in operation since 2014 due to a lift malfunction of the Blue doublechair.

Bela Ski Resort: TC Gače Ski Resort (ex Bela Ski Resort) is a family Slovenian ski resort located in municipality of Semič on the Pogorelec mountain.  Closest city is Novo Mesto.  It is near Croatian border.  Resort offers 8 km of ski slopes with different difficulty and 6,5 km of cross-country skiing (2 tracks).  There are also sledding slope, hiking path and the mountain biking trail in the summer.

Supporting paragraphs: Flathead Valley Whitefish Mountain Resort
Answer: The Big Mountain