Fiber reinforced polymer foam articles are disclosed. Through the system and process of the present disclosure, fibers can be incorporated into the foam article during an injection molding process while minimizing fiber breakage. Thus, foam articles can be produced having relatively long fibers. For instance, when using a feed stock containing fibers having a length greater than about 0.7 cm, such as from about 1 cm to about 1.3 cm, foam articles can be produced in which at least about 10% by volume of the fibers have a length greater than 3 mm and wherein at least about 1% by volume of the fibers have a length greater than about 7 mm.