I wouldn't free range them.
Are they at laying age? Do you have someone stopping in to make sure they have food, water, and the eggs are gathered so that they don't become broody or learn a bad habit of eating their eggs?
If your run and coop are predator proof, I personally would allow them access to the run but no free-ranging. I'm not sure of your set up. My run has a roof, and apron, along with hardware cloth everywhere.
I personally would only let them in my run since that is predator proof, no free ranging. We have lots of predators and weasels need a very small hole to get into and eliminate the entire flock. They can easily fit through a chicken wire hole.
My coop and run is predator proof, I leave the door open all the time even in winter (expect for the weeks that are -30F). I wouldn't leave the run door open if this is the door you use to let them free-range outside of the run/coop.