Four. First base, second base, third base and home plate.
The distance from home plate to second base on a regulation Major League Baseball field is 121 feet, zero inches. Another answer: Major League Baseball rule 1.04 defines the distance from home plate to 2nd base as 127 feet, 3 3/8 in.
If the bases are 60' apart, the distance from home plate to second base is 84'10"
About 127 Ft.
pitchers mound first base second base third base home plate outfield dugout
It's pretty close to 90 feet also.
First base, then second base, then third base, then home plate, whereupon one run is scored for their team.