One of the most prestigious high school math contests, run by Harvard & MIT students.

HMMT is a semiannual (biannual) high school mathematics competition that started in 1998.The Autumn (November) tournament is held annually at Harvard University in Cambridge, Massachusetts, and the Spring (February) tournament is held annually at MIT, also in Cambridge. The competition is organized and executed in a tightly-knit partnership between the corresponding student groups at Harvard and at MIT. From problem writing to logistics, the competition is handled primarily by undergraduate students at the universities.