Lake Tarleton is a 334 acres (1.4 km²) water body located in Grafton County

Grafton County, New Hampshire

Grafton County is a county located in the U.S. state of New Hampshire. As of the 2010 census, the population was 89,118. Its county seat is North Haverhill, which is a village within the town of Haverhill. Until 1972, the county courthouse and other offices were located in downtown Woodsville, a...

 on the western edge of the White Mountains

White Mountains (New Hampshire)

The White Mountains are a mountain range covering about a quarter of the state of New Hampshire and a small portion of western Maine in the United States. Part of the Appalachian Mountains, they are considered the most rugged mountains in New England...

 in New Hampshire

New Hampshire

New Hampshire is a state in the New England region of the northeastern United States of America. The state was named after the southern English county of Hampshire. It is bordered by Massachusetts to the south, Vermont to the west, Maine and the Atlantic Ocean to the east, and the Canadian...

. The lake is located in the towns of Piermont

Piermont, New Hampshire

Piermont is a town in Grafton County, New Hampshire, United States. The population was 790 at the 2010 census. It is home to several summer camps.-History:...

 and Warren

Warren, New Hampshire

Warren is a town in Grafton County, New Hampshire, United States. The population was 904 at the 2010 census. Warren includes the village of Glencliff....

. Water from Lake Tarleton flows via Eastman Brook west to the Connecticut River

Connecticut River

The Connecticut River is the largest and longest river in New England, and also an American Heritage River. It flows roughly south, starting from the Fourth Connecticut Lake in New Hampshire. After flowing through the remaining Connecticut Lakes and Lake Francis, it defines the border between the...

.

Kingswood Camp for Boys is located on the lake. The Appalachian Trail

Appalachian Trail

The Appalachian National Scenic Trail, generally known as the Appalachian Trail or simply the AT, is a marked hiking trail in the eastern United States extending between Springer Mountain in Georgia and Mount Katahdin in Maine. It is approximately long...

 runs nearby on Mount Mist, then continues north to Mount Moosilauke, with both mountains overlooking the lake.