The Raiders (23-11) are headed to the NCAAs for the second season in a row and the third time in four seasons.
Jack Ferguson led Colgate with 17 points, and Nelly Cummings added 15. Tucker Richardson and Jeff Woodward contributed 12 points apiece, and Oliver Lynch-Daniels finished with 10. Woodward pulled down eight rebounds.
Greg Summers put up a game-high 18 points and grabbed eight rebounds for the Midshipmen (21-11).