The east-west tilt of the Peninsula results in a general
flow of waters toward Lake Huron. Some of this drainage
occurs beneath the surface in underground channels
and rivers that have cut their way through the
soft porous rock. On the surface, the northern Bruce
is dotted with wetlands and lakes and has a history of
rich inland fisheries.
Within [Bruce Peninsula National Park], surface waters
move northeast to southwest. A complex of inland
lakes, including Emmett, Crane, George, Umbrella,
and Upper and Lower Andrew, are found in the north
central portion of the Park; some occupy basins carved
by glacial action from the bedrock. In addition to the
surface flow, there is some underground drainage
through caves and fissures in the bedrock. The park
area also has several different types of beaches: sand,
cobble, and boulder.
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