How to Build a Pitching Mound

To build a pitching mound, you should know the regulation specifications. A regulation-sized pitcher’s mound is a circle with a diameter of 18 feet (5.5 meters). It is located exactly 59 feet from the back side of the home plate. The height of the mound should not be more than 10 inches higher than the surface level of the home plate.

The pitcher’s plate, also called the ‘pitching rubber’, should be 18 inches (45.7 cm) behind the center of the mound. The mound should begin to slope downwards towards home plate 6 inches (15.2 cm) in front of the pitching rubber.

Materials and Tools Needed

The material which is most suitable for construction of the pitching mound is heavy clay which is 40 parts sand, 40 parts clay and 20 parts silt. You can compute the amount that you need from the specified requirements. You will also need the rubber mat which is 24” long x 6” wide

The tools you will need are:

  • shovel
  • wheelbarrow
  • rake
  • roller press
  • stakes
  • string
  • tape measure

Steps to build a Pitching Mound

There are many ways of constructing the pitcher’s’ mound. One of the easiest ways is to begin by building the top of the mound, also called the plateau. Then slope the area in front of the pitcher’s plate towards the home plate until you reach ground level.

When you have finished the plateau, you can set the pitching mat in place. Go to the center of the mound and mark the point with a stake. Then measure two feet from the front of the mound inwards to the stake you just placed. This is the spot where you place the front of the pitching rubber. Roll it into the top layer of soil.

During construction, the mound soil should be moist but not sticky. Stack up the clay mixture inch by inch until you reach the right dimensions. Tamp the soil down with a heavy roller press after each layer has been set.

After all the effort placed in constructing the mound, you should maintain it well. One way of doing that is by covering the clay with plastic or tarp when the pitching mound is not in use.