The Putnam competition takes place on the first Saturday in December of each year. This year, it will take place on December 3.
The Putnam competition consists of a morning session and an afternoon session, each half having six problems and three hours to solve them. Students work individually. The competition is nationwide.
The North Central section of the Mathematical Association of America holds a team competition that takes place each year on a Saturday in mid-November. This year, it will take place on November 12.
The competition itself is three hours for ten problems. Students are organized into teams of three or two students, and work collaboratively. The competition consists of other teams from the Midwest and Canada.
The Department of Mathematics and Statistics at Winona State University hosts the Midwest Undergraduate Data Analytics Competition (MUDAC).
Students need to register in order to compete. News and announcements are posted on the mailing list. Please contact Tyler Lawson (tlawson (at) umn (dot) edu) with any questions.
Practice sessions for these competitions run weekly; students can come and go as is convenient.