For Major League Baseball, spring training usually ends right before the regular season starts, in late March or occasionally the first days of April.

In 2026 specifically, the MLB regular season opens with an Opening Night game on Wednesday, March 25, followed by a full traditional Opening Day slate on Thursday, March 26. That means the main run of Cactus and Grapefruit League spring training games effectively wraps up in the days just before those dates, with a few final exhibition games played from March 22–24 in Major and Minor League parks as tune‑ups.

So in practical terms, for fans checking the calendar and asking “when does spring training end,” you can think of it as ending in the last few days of March, right before Opening Day.

Information gathered from public forums or data available on the internet and portrayed here.