2025 March Madness Locations List. As is tradition, the 2025 first four will be held in dayton, ohio at the university of dayton arena. How the field of 68 is picked;
A total of 68 teams will compete in the thrilling march madness tournament, which culminates with the final four and championship game at the alamodome in san antonio, texas. March madness 2025 begins with first four games tuesday, march 18, in dayton, ohio, and ends with the final four on april 5 and 7 at the alamodome in san antonio.