Walkway for People and Horses Alongside a Canal
Puzzle 7 of The 1950s Hard Pack
Question is: Walkway for People and Horses Alongside a Canal
and the answer is: TOWPATH
Word Meaning:
TOWPATH — A path alongside a canal or river, originally for draft animals towing barges, now more often used as a footpath, nature trail, etc.
Definitions from Wiktionary.