Lonely Trail

At a pull-out off of the main highway, I found this well-manicured trail where the rocks had been cleared to the side.  The trail was wide enough for two horses to pass.  There were rock cairns on the top of the ridge that could be seen from far away.  In the distance there were other rock cairns where I assume the trail led.

 

 

 The cairns.  I wonder if anyone still uses this trail.