Question: Gold Mountain Casino is about 34 miles north of the largest casino in the United States based on what?

Context paragraphs:
Spirit Mountain Casino (Oregon): Spirit Mountain Casino is a Native American casino located in Grand Ronde, Oregon, United States on Oregon Route 18.  It is operated by the Confederated Tribes of the Grand Ronde Community of Oregon, and was created to "enhance economic self-sufficiency opportunities for the Confederated Tribes of Grand Ronde, its members and surrounding communities; to promote economic diversification by the Tribes: to support a variety of housing, educational and cultural programs under the direction of Tribal Council".  It is the state's busiest , drawing three million visitors a year.

WinStar World Casino: WinStar World Casino and Resort is a hotel and casino located near the Oklahoma–Texas state line, 1 mi north of the Red River, at Exit 1 off Interstate 35 and Winstar Boulevard in Thackerville, Oklahoma.  The casino opened as the WinStar Casino in 2004, and was expanded (with a 395-room hotel tower) and renamed the WinStar World Casino in 2009, with its 519000 sqft of casino floor making it the largest casino in the state of Oklahoma.  In August 2013, WinStar Resorts completed a major expansion project, which added a new 1000-room second hotel tower that was divided into two phases; this also added a new casino that is attached to the tower.  As a result of the completion of this expansion, the casino overtook Foxwoods Resort Casino to become the largest casino in the United States based on gaming floor space.  WinStar has over 7,400 electronic games, 46 table poker rooms, 99 total table games, Racer's off-track betting, High Limit Room, keno, and bingo.

Gold Mountain (Washington): Gold Mountain is a 1761 ft summit in the Blue Hills on the Kitsap Peninsula of Washington state, in the United States' Pacific Northwest.  It is the highest point on the Kitsap Peninsula and the highest point in Kitsap County, Washington, and nearby 1639 ft Green Mountain is the second-highest point.

Valley Junction, Oregon: Valley Junction is an unincorporated community in Polk County, Oregon, United States.  It is located at the junction of Oregon Route 18 and Oregon Route 22, on the South Yamhill River east of Grand Ronde.  A now-abandoned section of the Willamina and Grand Ronde Railway short line passed through Valley Junction.  The Fort Yamhill State Heritage Area and Spirit Mountain Casino are nearby.

Fort Hill, Oregon: Fort Hill is an unincorporated community in Polk and Yamhill counties in Oregon, United States.  It is located about a mile east of Spirit Mountain Casino on Oregon Route 22 near the South Yamhill River.  For statistical purposes, the United States Census Bureau has defined Fort Hill as a census-designated place (CDP).  The census definition of the area may not precisely correspond to local understanding of the area with the same name.  The hill of the same name, located just east of Valley Junction, was the site of a blockhouse built by settlers in 1855–1856.  The blockhouse became part of Fort Yamhill, and was later moved to Grand Ronde Agency and is now located in Dayton.

Gold Mountain, California: Gold Mountain is a census-designated place in Plumas County, California.  Gold Mountain sits at an elevation of 5341 ft .  The 2010 United States census reported Gold Mountain's population was 80.

Kimberly, Utah: Kimberly is a ghost town in the northwest corner of Piute County, Utah, United States.  Located high in Mill Canyon on the side of Gold Mountain in the Tushar Mountains, Kimberly was formerly a gold mining town.  Originally settled in the 1890s, it lasted until 1910.  Kimberly had a minor rebirth in the 1930s, but has been uninhabited since about 1938.  The town is perhaps best known as the birthplace of Ivy Baker Priest, a former United States Treasurer.

Gold Mountain Casino: Gold Mountain Casino is a Native American casino in Ardmore, Oklahoma, owned and operated by the Chickasaw Nation.  Originally opened in 2002 as Ardmore Gaming, the facility has grown steadily and today features more than 300 gaming machines.  The casino is open 24 hours a day, seven days a week.  The 8620 sqft casino is located on the corner of P Street N.E. and Sam Noble Parkway, and can be accessed via Interstate 35, exit 33.  It is a short distance from the Ardmore Convention Center and the Hardy Murphy Coliseum.  Gold Mountain is about 34 miles north of WinStar World Casino in Thackerville, Oklahoma, and 77 miles south of Riverwind Casino in Norman, Oklahoma, which are also Chickasaw-owned gaming facilities.

Green Mountain (Kitsap County, Washington): Green Mountain is a 1639 ft summit in the Blue Hills on the Kitsap Peninsula of Washington state, in the United States' Pacific Northwest.  It is the second highest point on the Kitsap Peninsula and in Kitsap County, Washington, after nearby 1761 ft Gold Mountain.

On Gold Mountain: On Gold Mountain: The One-Hundred-Year Odyssey of My Chinese-American Family describes 100 years of author Lisa See’s family history, providing a complex portrait of her family’s hard work, suffering, failures and successes as they moved from China to the United States.  Speaking of the Chinese side of her family, See has said: "Things were so fractured and wild at home ... But the weekends with my grandparents became the real center for me ... It was the side of the family I identified more with.  It was fun, romantic, solid".  The book has inspired both an opera, and a museum exhibition.  It also provides helpful context for See's novel, "Shanghai Girls".  The time frame for "Shanghai Girls" is 1937-1957, corresponding to Parts IV and V of "On Gold Mountain."

Supporting paragraphs: Gold Mountain Casino WinStar World Casino
Answer: gaming floor space