A portable splint system is disclosed. The portable splint system has a limb supporting splint having at least two sections, each section has a substantially continuous cover plate, each cover plate having a concave contoured upper surface for cradling a splinted limb. A locking hinge connects the sections of the limb supporting splint. The limb supporting splint may also have one or more vertical support arches mounted thereon. The limb supporting splint is suitable for use in a bed or overhead traction apparatus. The portable splint system also includes a portable base unit onto which the limb supporting splint may be attached. The portable base unit has a stabilizing frame, height adjusters for independently adjusting the height of the proximal end of the limb supporting splint and the distal end of the limb supporting splint, and traction weight supports.