This more general image is of the relatively basic roadways common to rural areas in the mid-20th Century. The main roads would all be paved with asphalt, but such roads as shown here would be mostly dirt and crushed rock which made it possible to forego more expensive materials and construction.
The description states:
Greetings from Iron River, Michigan
The breath-taking beauty of a drive off the main highway is ample reward for a few hours time.
–The background of the picture appears to show a significant structure among the trees, possibly a camping site or trailer parking.