Pool 4 is the longest pool in terms of river miles and has both the largest water area and Longest shoreline. The entire Lake Pepin area accounts for much of the length and size of the pool. There are many public park facilities in this pool. These facilities include Frontenac State Park on the Minnesota side. Several municipal parks include Wabasha Municipal Park, Colville Municipal Park, Hok-Si-La Municipal Park, Ohuta Municipal Park, McChill Municipal Park, and Roscher Park. With the size and the number of parks this pool offers plenty of opportunity for fishing and sightseeing.