When all I had were RSLs, they would wander north to the back fence of the horse paddocks -- a little less than 100 yards from the coop. To the south, they wouldn't wander quite so far -- only to the south side of the house -- and would usually stay close to the house when they were down that far. Occasionally if someone was at the playset they'd feel secure enough to go that far.
Now that I have a larger flock that includes a roo, I frequently see them all wandering past the playset and strolling through the grass between the east and west fences. If I put some food, water, and shelter down there they'd probably explore the full 5 acres on a regular basis. Now they're stopping about 200' ft shy of the south property line.