NCAA women's ice hockey tournament

The annual NCAA women's ice hockey tournament—officially known as the National Collegiate Women's Ice Hockey Championship—is a college ice hockey tournament held in the United States by the National Collegiate Athletic Association to determine the top women's team in the NCAA. Unlike most NCAA sports, women's ice hockey uses a modified version of the National Collegiate championship format, which means Division I and Division II teams compete against each other in the same tournament. The semifinals and championship game of the tournament are branded as the women's "Frozen Four", a reference to the NCAA's long-time branding of its basketball semi-finals as the "Final Four".

Source: Wikipedia — NCAA women's ice hockey tournament (CC BY-SA 4.0)