Abstract: A portable starting block, used by track athletes, is constructed of sections of two lightweight aluminum extrusions. One of these extrusions comprises a foot pedal portion having a generally concave, outwardly facing, foot-engaging portion with an inwardly turned track-engaging end. The other portion of the starting block is a support plate, which also has a track-engaging end and an upper end for pivotal interconnection with the foot pedal portion. The pivotal interconnections are formed as mating extrusions, one of which slides into the other to form a movable hinge between the two portions of the starting block. This permits any desired incremental angle adjustment of the starting block within a fairly wide range of angles. The two parts are locked together by a locking pin; and when the block is folded into its storage position, the foot pedal portion underlies the support plate portion.