Mitola went off for a season-high 19 points and Boehm hit 7 of 10 shots for 15 points, also a season best to lead Big Green (3-1). Dartmouth hadn't played since Nov. 16 and was playing its first road game of the season.
Maine drew first blood and maintained narrow leads until the Big Green made a 9-0 run to lead 26-25 with 4:09 left in the opening half.
Dartmouth finished those last four minutes at a 13-5 clip, led 39-30 at the break and never trailed in the second half.
Zarko Valjarevic led Maine (1-5) with 17 points.