Great Pyrenees Mix Loose (Tucson)

Have tried to rescue, but I am not physically able to keep on the path.
Great Pyrenees mix white with light brown patches on the face, almost like St.
Bernard.
Beautiful dog, but it has definitely been in elements awhile.
Very timid and will not come even for food or treats.
It is behind churches off Thorneydale NW Tucson between Magee and Ina.
Washes between houses.
Just an FYI if your looking for your dog.
Will check pet rescue sites for owner.
Would like to see it reunited with its owners.