Where I grew up (Alabama and Florida), kids universally called it "safe." A game would be getting ready to start. Some poor panicked young'un who tired easily would jump in and say, with an edge of shrillness to his/her voice, "But where's safe?" And a tree, the side of a barn, the roof of a car or the top of a sandhill would be declared.

Though you were certainly frowned on if you proved wussy enough to stay at safe all the time.