distance between softball plate to mound
1 Distance from home plate to the pitcherâs mound: 43 feet. 2  Distance from first base to third base (across the diamond): 84 feet, 10Â¼ inches. 3  Distance from home plate to second base (across the diamond): 84 feet, 10Â¼ inches.  Distance from home plate to the backstop (not mandatory): 25 to 30 feet.