Thousand Islands National Park

Thousand Islands National Park
IUCN category II (national park)[1]
Aerial view of Thousand Islands National Park
Location of Thousand Islands National Park in Canada Show map of Canada Location of Thousand Islands National Park in Southern Ontario Show map of Southern Ontario
Location	United Counties of Leeds and Grenville, Ontario, Canada
Nearest city	Brockville, Ontario
Coordinates	44°21′09″N 75°57′19″W / 44.35263°N 75.95532°W / 44.35263; -75.95532
Area	24.4 km2 (9.4 sq mi)
Established	1904
Visitors	109.284 (in 2022–23[2])
Governing body	Parks Canada

Thousand Islands National Park (established 1904), formerly known as the St. Lawrence Islands National Park, is a Canadian National Park located on the 1000 Islands Parkway in the Thousand Islands Region of the Saint Lawrence River. The islands are actually the worn-down tops of ancient mountains. This region, the Frontenac Axis, connects the Canadian Shield from Algonquin Park in Ontario to the Adirondack Mountains in New York.

The park consists of 21 islands plus many smaller islets, 2 mainland properties and a visitor centre at Mallorytown, Ontario on the mainland. It is one of Canada's smallest national parks with a total area of 24.4 square kilometres (9.4 sq mi).

Much of the park is only accessible by boat. Trail systems can be found on the mainland along the 1000 Islands Parkway at Mallorytown Landing, Jones Creek and Landon Bay. There are picnic, camping and oTENTik facilities on several islands and at Mallorytown Landing.^{[citation needed]} Mallorytown Landing is a day use area that offers a large parking, a boat ramp, several oTENTiks, picnic gazebos, play ground, animal exhibits, travelling exhibits, and interpreters.^{[citation needed]}

The Frontenac Arch Biosphere Reserve, in which the park is located, is known for being the most biodiverse region in Canada.^[3]