A deployable corral system for any upright wall, including a wall of a transport trailer, provides a readily deployable corral along the trailer, and is readily stowable along the trailer in a retracted configuration for travel. The corral includes a pair of spaced-apart and extendable corral rails with a pivoting cross-rail extending from the distal end of each extendable corral rail. When the extendable corral rails are extended the cross-rails are spaced from an exterior side of the livestock trailer, and when the extendable corral rails are retracted the cross-rail is positioned near an upright wall of the trailer. The deployable corral system optionally includes a manual deployment assist system to assist a user during deployment and stowage of the corral. Additional features may include a deployable shade awning, a deployable trough, and extendable vertical support stands.