These cells are meant for captured bandits and gang members, or for holding the more dangerous criminals that smaller town cells are not as equipped to handle. The fort will also hold international criminals, should they be caught nearby, or caught elsewhere and brought there for holding until the Bureau or a Mexican official can pick them up.

The stables of El Presidio can hold up to five horses, one fine officer's horse, a space for the mailcoach horse should the mailcoach need an emergency stop, and three others for travelers through the territory. It has two stablehands, one supervisor that deals with ordering the supplies and keeping things organized, and the younger hand that tends the horse(s) and mucks out the stall(s).