paragraph_text: Lake Ontario is one of the five Great Lakes of North America. It is surrounded on the north, west, and southwest by the Canadian province of Ontario, and on the south and east by the American state of New York, whose water boundaries meet in the middle of the lake. Ontario, Canada's most populous province, was named for the lake. Many of Ontario's most populous cities, including Toronto, Canada's most populous city, and Hamilton, are on the lake's northern or western shores. In the Huron language, the name Ontarí'io means "Lake of Shining Waters". Its primary inlet is the Niagara River from Lake Erie.  The last in the Great Lakes chain, Lake Ontario serves as the outlet to the Atlantic Ocean via the Saint Lawrence River. It is the only Great Lake not to border the state of Michigan.

paragraph_text: There are seven state parks within the confines of New York City, including Clay Pit Ponds State Park Preserve, a natural area which includes extensive riding trails, and Riverbank State Park, a 28-acre (110,000 m2) facility that rises 69 feet (21 m) over the Hudson River.

paragraph_text: Gibson Lake is a lake in geographic Biggar Township, Nipissing District in Northeastern Ontario, Canada. It is in the Saint Lawrence River drainage basin and lies within Algonquin Provincial Park. The major outflow, at the southwest, is Gibson Creek which flows to the Nipissing River, and then via the Petawawa River and the Ottawa River to the Saint Lawrence River.

paragraph_text: Lake Superior is the largest of the Great Lakes of North America. The lake is shared by the Canadian province of Ontario to the north, the US state of Minnesota to the west, and Wisconsin and the Upper Peninsula of Michigan to the south. It is generally considered the largest freshwater lake in the world by surface area. It is the world's third - largest freshwater lake by volume and the largest by volume in North America. The furthest north and west of the Great Lakes chain, Superior has the highest elevation and drains into the St. Mary's River.

paragraph_text: Black Lake is located in Cheboygan and Presque Isle counties in northern Michigan, United States. With a surface area of , it is the seventh largest inland lake in Michigan. The largest body of water in the Black River watershed, it drains through the Lower Black and Cheboygan rivers into Lake Huron. Black Lake is a summer destination for many families from the suburban Detroit area and from other nearby states as well as residents of the neighboring town of Onaway.

paragraph_text: Elizabeth Lake is located in Glacier National Park, in the U. S. state of Montana. Elizabeth Lake lies along the Belly River and is more than downstream from Helen Lake.

paragraph_text: Though the five lakes lie in separate basins, they form a single, naturally interconnected body of fresh water, within the Great Lakes Basin. They form a chain connecting the east - central interior of North America to the Atlantic Ocean. From the interior to the outlet at the Saint Lawrence River, water flows from Superior to Huron and Michigan, southward to Erie, and finally northward to Lake Ontario. The lakes drain a large watershed via many rivers, and are studded with approximately 35,000 islands. There are also several thousand smaller lakes, often called ``inland lakes, ''within the basin. The surface area of the five primary lakes combined is roughly equal to the size of the United Kingdom, while the surface area of the entire basin (the lakes and the land they drain) is about the size of the UK and France combined. Lake Michigan is the only one of the Great Lakes that is located entirely within the United States; the others form a water boundary between the United States and Canada. The lakes are divided among the jurisdictions of the Canadian province of Ontario and the U.S. states of Michigan, Wisconsin, Minnesota, Illinois, Indiana, Ohio, Pennsylvania, and New York. Both Ontario and Michigan include in their boundaries portions of four of the lakes: Ontario does not border Lake Michigan, and Michigan does not border Lake Ontario. New York and Wisconsin's jurisdictions extend into two lakes, and each of the remaining states into one of the lakes.

paragraph_text: Shinga is a town in Gombe State of Nigeria. It lies at an elevation of 425 meters between the Bima Hills and the left (east) bank of the Gongola River.

paragraph_text: Bacerac is a town in Bacerac Municipality in the Mexican state of Sonora. It is situated in the northeast of the state and the municipality has boundaries with Bavispe Municipality in the north, with Huachinera in the south, with the state of Chihuahua in the east, and with the municipalities of Nacozari de García and Villa Hidalgo in the west. The municipal seat lies at an elevation of 1,432 meters above sea level.

paragraph_text: Murphy Lake is a lake in Washington County, Wisconsin, United States. Murphy Lake lies at an elevation of 974 feet (297 m).

paragraph_text: Cleaver Lake is a lake in Thunder Bay District, Ontario, Canada. It is about long and wide, and lies at an elevation of about northwest of the community of Schreiber. The primary inflow and outflow is the Whitesand River, and the lake is immediately upstream of Zenith Lake.

paragraph_text: Murphy Lake is a lake in Grand County, Colorado, United States. Murphy Lake lies at an elevation of 11,224 feet (3,421 m).

paragraph_text: Buttle Lake is a lake on Vancouver Island in Strathcona Regional District, British Columbia, Canada. It is about long and wide, has an area of , is up to deep, and lies at an elevation of . The lake is located between Campbell River and Gold River in Strathcona Provincial Park; there is a camping site on the shore. The lake is the source of the Campbell River.

paragraph_text: Mississagi Provincial Park is a natural environment-class park north of Elliot Lake, in Algoma District, Ontario, Canada. It lies on the Boland River, a tributary of the Little White River, which is a tributary of the Mississagi River. The park is accessed via Highway 639.

paragraph_text: Sauble Falls Provincial Park is located in the community of Sauble Falls, town of South Bruce Peninsula, Bruce County in southwestern Ontario, Canada. It is in the lower drainage basin of the Sauble River, which flows into Lake Huron. The campground consists of two sections divided by County Road 13. The West section of the site is a quiet zone (no radios allowed). Group camping is available in the east section. Many sites along the east portion of the park back up against the Sauble River. The park is also the downstream terminus of the Rankin River canoe route.

paragraph_text: Lake Edward lies at an elevation of 920 metres (3,020 ft), is 77 kilometres (48 mi) long by 40 kilometres (25 mi) wide at its maximum points, and covers a total surface area of 2,325 square kilometres (898 sq mi), making it the 15th-largest on the continent. The lake is fed by the Nyamugasani River, the Ishasha River, the Rutshuru River, the Ntungwe River, and the Rwindi River. Lake George to the northeast empties into it via the Kazinga Channel. Lake Edward empties to the north via the Semliki River into Lake Albert.

paragraph_text: Mississagi River Provincial Park is a protected area on the Mississagi River in Algoma and Sudbury Districts, Ontario, Canada. It has an Ontario Parks designation of Waterway Class. The park encompasses the river and lakes on the river from Mississagi Lake to Bark Lake, and further downstream to a point just above Ricky Island Lake, as well as portions of the upper Spanish River system.

paragraph_text: Summit Lake is a lake in the Michipicoten River system in the Lake Superior drainage basin located at Goudreau in the Unorganized North Part of Algoma District, Ontario, Canada. It is about long and wide, lies at an elevation of . The primary inflow is McVeigh Creek from Spring Lake, and the primary outflow is McVeigh Creek to Philip Lake, which flows via the Hawk River and Michipicoten River into Lake Superior. The Algoma Central Railway runs along the east shore of the lake.

paragraph_text: The Hudson River is a 315 - mile (507 km) river that flows from north to south primarily through eastern New York in the United States. The river originates in the Adirondack Mountains of Upstate New York, flows through the Hudson Valley, and eventually drains into the Atlantic Ocean, between New York City and Jersey City. The river serves as a political boundary between the states of New Jersey and New York, and further north between New York counties. The lower half of the river is a tidal estuary occupying the Hudson Fjord, an inlet which formed during the most recent period of North American glaciation, estimated at 26,000 to 13,300 years ago. Tidal waters influence the Hudson's flow from as far north as Troy.

paragraph_text: Crawford Lake is a lake in the Moose River drainage basin in Sudbury District, Ontario, Canada. It is about long and wide, and lies at an elevation of about south of Ontario Highway 101 and west of Ontario Highway 144.

Question: How many meters is Riverbank State Park elevated above the largest river, in the state that lies to the east of Lake Ontario?
Answer: 21