Mirror Lake is a mountain lake

Lake

A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...

 in Clackamas County

Clackamas County, Oregon

Clackamas County is a county located in the U.S. state of Oregon. The county was named after the Native Americans living in the area, the Clackamas Indians, who were part of the Chinookan people. As of 2010, the population was 375,992...

 of the U.S. state

U.S. state

A U.S. state is any one of the 50 federated states of the United States of America that share sovereignty with the federal government. Because of this shared sovereignty, an American is a citizen both of the federal entity and of his or her state of domicile. Four states use the official title of...

 of Oregon

Oregon

Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...

. It is located at the foot of Tom Dick and Harry Mountain

Tom Dick and Harry Mountain

Tom Dick and Harry Mountain is a two-mile-long volcanic mountain in Clackamas County in the U.S. state of Oregon.It is located southwest of Mount Hood, west-southwest of Government Camp between the Zigzag River and Still Creek, south of Zigzag Mountain...

 in a natural catchment formed by a toe of the mountain, 11.4 kilometres (7.1 mi) southwest of Mount Hood

Mount Hood

Mount Hood, called Wy'east by the Multnomah tribe, is a stratovolcano in the Cascade Volcanic Arc of northern Oregon. It was formed by a subduction zone and rests in the Pacific Northwest region of the United States...

, and 3.1 kilometres (1.9 mi) WSW of Government Camp

Government Camp, Oregon

Government Camp is an unincorporated community located in Clackamas County, Oregon, United States, south of Mount Hood and north of Tom, Dick and Harry Mountain. It is a gateway to several ski resorts, the most popular being Timberline Lodge and Mount Hood Skibowl. Also, Government Camp has its...

 within Mount Hood National Forest

Mount Hood National Forest

The Mount Hood National Forest is located east of the city of Portland, Oregon, and the northern Willamette River valley. The Forest extends south from the Columbia River Gorge across more than of forested mountains, lakes and streams to the Olallie Scenic Area, a high lake basin under the slopes...

.

It is among the most popular day hikes in the Mount Hood area, and a popular Nordic skiing destination. Its 800 feet (243.8 m) elevation gain in 1.4 miles (2.3 km) is considered an easy hike.