I used Google Earth to try to find the spot.
Here's the image from G.E., I marked the zig zag with the x pointer. The other pointer is the location of the dot on
the topo map I found related to John Likely's search.
Click the map to see the full-size:
![](https://photos.smugmug.com/Other/Whitney/i-2KLzrsC/0/M/zigzagspot-M.jpg)