Umbagog Lake straddles the state line between New Hampshire and Maine, where the waters of Mollidgewock Brook and the Dead Cambridge River converge. This northern landscape is defined by its series of islands, including Metallak Island, Bear Island, and Big Island, which cluster near Tidswell Point and the quiet waters of Thurston Cove. The small settlement of Upton sits on the eastern shore, positioned near the rising slopes of the Hampshire Hills.
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1930 · Milan
USGS Topo · 1:62,500
1930 · Errol
USGS Topo · 1:62,500
1933 · Milan
USGS Topo · 1:62,500
1934 · Errol
USGS Topo · 1:62,500
1934 · Milan
USGS Topo · 1:62,500
1940 · Oquossoc
USGS Topo · 1:62,500
1942 · Oquossoc
USGS Topo · 1:62,500
1943 · Old Speck Mtn
USGS Topo · 1:62,500
1945 · Old Speck Mtn
USGS Topo · 1:62,500
1950 · Lewiston
USGS Topo · 1:250,000