Walupt Lake
Walupt Lake is a large freshwater lake located in the Gifford Pinchot National Forest in the Cascade Mountains of Washington. It is located near the town of Packwood and is popular for camping, boating, and hiking. The eastern half of the lake is within the Goat [Rocks Wilderness]. It is the deepest and second largest natural lake in Lewis County.
Hydrology
Walupt Lake is a ribbon lake situated near the end of a long glacial valley. The main inflow to Walupt Lake is the perennial, snowmelt-fed Walupt Creek, which flows out of a long valley into the east end of the lake. Other small streamlets flow into the lake from the steep valley walls above. The lake's watershed encompasses of land in the southern Goat Rocks. Besides the lake itself, the watershed comprises forest and otherwise unproductive land.Walupt Creek is also the lake's outflow, exiting the lake on its northwestern corner. The lake is somewhat boot-shaped with the toe pointed up the valley to the east. The widest part of the lake is on the western end at, and the longest part is the southern third at. The lake has an area of with an average depth of. It is the deepest lake in Lewis County and is also one of the deepest in Washington with a maximum depth of. The lake holds about of water, putting it among the top 25 lakes in Washington by volume.
Walupt Lake was created by an ancient landslide when the ridge on the northwest end slid down and created a natural dam.