A mobile arched telescopic deployable stage system. The system has a stage portion, with a main stage portion and a plurality of extension stage portions. The extension stage portions are hinged to the main stage portion and deployable from an undeployed, folded state to a deployed, flat state. Deployable legs extend under the stage portion. The system has an arched frame portion with a right side section and a left side section, each having a lower arched portion and an upper arched portion. In a shorter, undeployed state, the upper arched portion is unextended from the lower arched portion. In longer, deployed state the upper arched portion extends from the lower arched portion. Terminal ends of the upper arched portions are pivotally attached to each other, and each of the lower arched portions being pivotally attachable at lower ends thereof to the stage portion. Raising devices raise the arched frame portion from the stage portion.