At its deepest, the lake is

Directions: Read the following passage and answer the question that follows.

Lost Lake that lies in Oregon's Mount Hood National Forest is a mysterious natural wonder. During winters, it resembles any other large body of fresh water. However, as drier weather kicks in, the water disappears, transforming the 85 acre 'lake' into a beautiful meadow. It turns out that there is a logical answer to this magical phenomenon - a tube or tunnel created by an ancient lava flow that drains out the water.
Jude McHugh, a spokeswoman for the Willamette National Forest in Oregon, says that the lakebed starts to fill during the rainy season in the fall. As the lava tube measures just six-feet in diameter, it is unable to drain the water fast enough. As a result, the lake, which is 167 ft at its deepest, manages to remain full, despite the fact that some water is always seeping out. This continues through spring as the snow from the surrounding mountains melts. But once the steady flow of water stops, the constant drainage causes the lake to "disappear".