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Lake Facts

Long Lake has a legal lake level of 856.0 feet above mean sea level established by circuit court order.


Based on information from the Michigan Geographic Data Library, Long Lake is the 220th largest lake in Michigan. Click here for a downloadable copy of Long Lake Facts & Figures.

Long Lake flows into Austin Lake which flows into the Portage River, the St. Joseph River, and eventually into Lake Michigan. The elevation of Long Lake lies approximately 276 feet above Lake Michigan.

Physical Features

Lake Surface Area                                                                496 acres
Maximum Depth                                                                      57 feet
Mean Depth                                                                           9.2 feet
Lake Volume                                                               4,543 acre-feet
Shoreline Length                                                                  6.3 miles
Shoreline Development Factor                                                      2.0
Lake Elevation                                                                       856 feet


DNR Status of the Fishery Report

In 1977, the Michigan Department of Natural Resources conducted a fish survey on Long Lake. The report can be found here.


Long Lake Bio-Volume

In the fall of 2021, a hydro-acoustic survey of Long Lake was conducted by Progressive AE to map and quantify the lake's bio-volume. The results of this survey were used to refine aquatic plant survey locations in 2022. The adjacent map is a graphical representation of Progressive AE's findings.

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