Question: Grandmother Gap is located near what non-profit attraction and state park?
Context: Castle Rock State Park is a 5242 acre state park of California, USA, located along the crest of the Santa Cruz Mountains and almost entirely in Santa Cruz County, with parts extending into Santa Clara County and San Mateo County.  It embraces coast redwood, Douglas fir, and madrone forest, most of which has been left in its wild, natural state.  Steep canyons are sprinkled with unusual rock formations that are a popular rock climbing area.  The forest here is lush and mossy, crisscrossed by 32 mi of hiking trails.  These trails are part of an even more extensive trail system that links the Santa Clara and San Lorenzo valleys with Castle Rock State Park, Big Basin Redwoods State Park, and the Pacific Coast.  Due to its overnight parking lot, Castle Rock is a popular starting point for the Skyline-to-the-Sea Trail, a 30 mi trail that begins near by at Saratoga Gap and leads to Waddell Beach north of Santa Cruz.  There are two walk-in campgrounds within the park for overnight backpacking. Silver Falls State Park is a state park in the U.S. state of Oregon, located near Silverton, about 20 mi east-southeast of Salem.  It is the largest state park in Oregon with an area of more than 9000 acre , and it includes more than 24 mi of walking trails, 14 mi of horse trails, and a 4 mi bike path.  Its 8.7 mi Canyon Trail/Trail of Ten Falls runs along the banks of Silver Creek and by ten waterfalls, from which the park received its name.  Four of the ten falls have an amphitheater-like surrounding that allows the trail to pass behind the flow of the falls.  The Silver Falls State Park Concession Building Area and the Silver Creek Youth Camp-Silver Falls State Park are separately listed on the U.S. National Register of Historic Places. Grandfather Mountain is a mountain, a non-profit attraction, and a North Carolina state park Reeds Gap State Park is a 220 acre Pennsylvania state park in Armagh Township, Mifflin County, Pennsylvania in the United States.  The park is largely a wilderness area with large white pine and hemlock trees.  Honey Creek flows through the park, providing a habitat for trout.  Reeds Gap State Park is 7 mi from U.S. Route 322 near Milroy in New Lancaster Valley and Bald Eagle State Forest. F.D. Roosevelt State Park is a 9049 acre Georgia state park located near Pine Mountain and Warm Springs.  The park is named for former U.S. President Franklin Delano Roosevelt, who sought a treatment for his paralytic illness in nearby Warm Springs at the Little White House.  The western portion of the park, formerly named Pine Mountain State Park, was named a National Historic Landmark in 1997.  F.D. Roosevelt State Park is Georgia's largest state park. Grandmother Gap (el.  4075 ft ) is a mountain pass in North Carolina on the Blue Ridge Parkway, between Grandmother Mountain and Beacon Heights, east of Linville and nearby Grandfather Mountain. Indian Springs State Park is a 528-acre (2.14 km²) Georgia state park located near Jackson and Flovilla.  The park is named for its several springs, which the Creek Indians used for centuries to heal the sick.  The water from these springs is said to have a sulfur smell and taste.  Indian Springs is thought to be the oldest state park in the nation.  It was acquired from the Creek Indians by the state through the Treaty of Indian Springs (1825) and the Treaty of Washington (1826).  Thereafter, Indian Springs has been operated continuously by the state as a public park, although it did not gain the title "State Park" until 1931.  The area became a resort town in the 19th century.  It became an official "State Forest Park" in 1927.  In 1931, along with Vogel State Park, it became a founding unit of Georgia's state park system. Parks in Greater St. Louis are administered by a variety of state, county, and municipal authorities.  The region also is home to the Jefferson National Expansion Memorial, site of the Gateway Arch, the only National Memorial in the state of Missouri.  Among the largest municipal parks is Forest Park, which is 1293 acre and is located in the city of St. Louis, although both Greensfelder County Park and Creve Coeur Park in St. Louis County are larger, at 1646 and respectively.  St. Louis County is also the location of two large state parks, Babler State Park with 3.8 sqmi and Castlewood State Park with 2.8 sqmi .  The largest state park in the region is Meramec State Park, located near Sullivan, Missouri, with 10.8 sqmi of parkland. Devil's Lake State Park is a state park located in the Baraboo Range in eastern Sauk County, just south of Baraboo, Wisconsin.  Devil's Lake State Park is the biggest state park in Wisconsin.  It is around thirty-five miles northwest of Madison, and is on the western edge of the last ice-sheet deposited during the Wisconsin drift.  This 9217 acre state park is known for its 500 ft quartzite bluffs along the 360 acre Devil's Lake, which was created by a glacier depositing terminal moraines that plugged the north and south ends of the gap in the bluffs during the last ice age approximately 12,000 years ago.  The sand at the bottom of Devil's Lake is thought to be deposited by glaciers.  Devil's Lake is situated in the Baraboo Hills.  The Baraboo Hills are thought to be much older than Devil's Lake itself; they are approximately 1.6 billion years old and were once part of the Baraboo Range which is thought to have been taller than the Rocky Mountains. Cherokee State Park is a 43 acre Oklahoma state park located in Mayes County, Oklahoma.  It is located near the city of Disney, Oklahoma.  Cherokee State Park is located in northeastern Oklahoma on the west shore of Grand Lake o' the Cherokees, one of Oklahoma's largest lakes with over 59000 acre and 1300 mi of shoreline.  The park consists of several smaller parks that are located near the Pensacola Dam and around the lake.  The area is known for great fishing and a variety of water sports.  Amenities include picnic sites, a group shelter, campsites, playgrounds, comfort stations, lighted boat ramp and a 9-hole golf course.
Answer: Grandfather Mountain