A tracked, portable radial stacker for stockpiling bulk material, comprising: a linear conveyor having a rear portion and a front portion and being designed to carry bulk material from a lower position adjacent the rear portion to a raised position adjacent the front portion; a continuous track system including a carriage frame to which the conveyor is mounted, the track system also including a pair of driven, parallel tracks designed to be selectively raised off the ground; a pair of wheels mounted to the carriage frame that are displaceable between a raised radial position in which they do not contact the ground and a first lowered position in which the pair of wheels are radially disposed and engage the ground to facilitate radial movement of the conveyor, the pair of wheels being pivotally mounted to the carriage frame such that they can pivot to a raised, substantially longitudinal position and can be lowered to a second lowered position in which the pair of wheels are substantially longitudinally disposed and engage the ground to facilitate longitudinal movement of the conveyor; wheel displacement means for powering the pair of wheels from the raised positions to the lowered positions such that when moving the pair of wheels to the lowered positions, the wheel displacement means lifts the tracks off the ground to permit the conveyor to be moved in lateral or longitudinal directions depending on the position of the pair wheels; a forwardly extending, hydraulically-powered, telescoping frame member extending from the carriage frame to the front portion of the conveyor for raising and lowering the conveyor; a mounting system fixed to the rear portion of the conveyor; characterized in that an upper and lower hydraulically-powered, rearwardly extending, telescoping frame members (28, 30) extend between the carriage frame and the mounting system for controlling the elevation of the rear portion of the conveyor and thereby controlling inclination of the conveyor, wherein the mounting system defines a longitudinally extending slot, and includes a trolley slidably mounted within the slot, and the upper and lower hydraulically-powered, rearwardly extending, telescoping frame members (28, 30) are pivotally mounted to the trolley so that as the upper and lower hydraulically-powered, rearwardly extending, telescoping frame members (28, 30) telescopingly extend and retract, the trolley slides forwardly and rearwardly in the slot, thereby reducing a tendency of the rear portion of the conveyor to longitudinally shift as the degree of inclination of the conveyor is changed and wherein the upper and lower hydraulically-powered, rearwardly extending, telescoping frame members (28, 30) are mounted to the trolley at a pair of longitudinally spaced mounting points (58, 60). a linear conveyor having a rear portion and a front portion and being designed to carry bulk material from a lower position adjacent the rear portion to a raised position adjacent the front portion; a continuous track system including a carriage frame to which the conveyor is mounted, the track system also including a pair of driven, parallel tracks designed to be selectively raised off the ground; a pair of wheels mounted to the carriage frame that are displaceable between a raised radial position in which they do not contact the ground and a first lowered position in which the pair of wheels are radially disposed and engage the ground to facilitate radial movement of the conveyor, the pair of wheels being pivotally mounted to the carriage frame such that they can pivot to a raised, substantially longitudinal position and can be lowered to a second lowered position in which the pair of wheels are substantially longitudinally disposed and engage the ground to facilitate longitudinal movement of the conveyor; wheel displacement means for powering the pair of wheels from the raised positions to the lowered positions such that when moving the pair of wheels to the lowered positions, the wheel displacement means lifts the tracks off the ground to permit the conveyor to be moved in lateral or longitudinal directions depending on the position of the pair wheels; a forwardly extending, hydraulically-powered, telescoping frame member extending from the carriage frame to the front portion of the conveyor for raising and lowering the conveyor; a mounting system fixed to the rear portion of the conveyor; characterized in that an upper and lower hydraulically-powered, rearwardly extending, telescoping frame members (28, 30) extend between the carriage frame and the mounting system for controlling the elevation of the rear portion of the conveyor and thereby controlling inclination of the conveyor, wherein the mounting system defines a longitudinally extending slot, and includes a trolley slidably mounted within the slot, and the upper and lower hydraulically-powered, rearwardly extending, telescoping frame members (28, 30) are pivotally mounted to the trolley so that as the upper and lower hydraulically-powered, rearwardly extending, telescoping frame members (28, 30) telescopingly extend and retract, the trolley slides forwardly and rearwardly in the slot, thereby reducing a tendency of the rear portion of the conveyor to longitudinally shift as the degree of inclination of the conveyor is changed and wherein the upper and lower hydraulically-powered, rearwardly extending, telescoping frame members (28, 30) are mounted to the trolley at a pair of longitudinally spaced mounting points (58, 60).