Start/Finish - Pencaitland Railway Path Car Park (West)

Turn Around as you reach top of path. 
 

Historic route with a lot of history. Signs along the way and well marked lots of history. 
 

There is also a double variation of Route both ways (Out & Back) - 12.7 Miles / GPX linked below.

This is a great out and back trail that starts at the Short Sands Trail - South Trailhead and goes up and over Neahkahnie and down the south side. There are steep climbs and many technical rooty and rocky sections that make it a worthy FKT route. I know it can be done much faster but wanted to kick it off as it's a beautiful and challenging trail. Route from All Trails: https://www.alltrails.com/explore/trail/us/oregon/neahkahnie-mountain--6