Pine Tree League was an Independent League that was based in Maine
1925 Mechanic Falls, Norway, Oxford, South Paris, Turner, West Paris
1926 No teams enter or left the league
1927 No teams enter or left the league
1928 No teams enter or left the league
1929 Bridgton, Lisbon Falls, Livermore Falls, Mechanic Falls, Norway, Oxford, Paris, Rumford
1930 Wilton enter the League and Bridgton has left the League
1931 Auburn and Norway-Paris enter the League and Norway and South Paris left the League.
1932 Lewiston enter the League and Auburn left the League
1933 Mechanic Falls and Oxford has left the League
1934 No teams enter or left the league
1935 Carrabassett Valley, Dixfield, Livermore falls, Lisbon Falls, Lewiston, Norway, Rumford, Sanford
1936 Farmington, Livermore Falls, Madison, Wilton, Road Team- Thomas All Stars
1937 Canton, Lewiston Aces, Lewiston Cardinals, South Paris, Turner, West Paris