Pathfinder #2

This puzzle and Pathfinder #1 have sort of a mini-theme going on. If I were a more skilled constructor, I would have tried to put the two relevant entries into a single puzzle, but alas, that was not to be.

Puzzle: 
AttachmentSize
PDF icon PDF of puzzle56.67 KB
Solution: 
AttachmentSize
PDF icon PDF of solution51.92 KB

Source: