Ncaa Tournament 2025 Brackets Lock Time. Et deadline as first round action. After 66 ncaa tournament games stretched over the last three weeks, the college basketball season will have one final game to decide a champion.

The deadline to submit depends on the site or app you are using to fill out your bracket. We’re taking you through each region, breaking down the top seed, the biggest threats to the favorites, the teams most likely to bust your bracket by the end of the first.