An example of the extensive peatlands occupying the bed of ancient glacial Lake Agassiz, illustrating the process of peat accumulation over about 11,000 years. The area contains Myrtle Lake Bog, which developed contrary to the usual successional process of lake filling, and is an excellent example of both raised and string bogs.[2]
The Myrtle Lake Peatland SNA is contained within the Lake Agassiz Peatlands and covers 22,950 acres (9,290 ha).[4]