Abstract: A portable pitching mound base has a network of structural elements with a flat bottom and generally circular periphery providing support for a cover which presents a flat top in the center and inclined sides sloping downward towards the periphery. The base is made in two halves with structural partitions at the dividing plane having access ports to allow lifting means such as a forklift, truck. The cover may be made of sheet material with metal mesh or with sheet aluminum having surrounding ridges to hold the overlying dirt of a pitcher's mound.