Personally, if I were given to this sort of thing, I'd guess at a track that prominently features water and boats - or I might think to myself "hey, this might be a track that prominently features water and boats", and then I might fire up the game to take a closer look at some of the locations I might guess at.
As a first guess, I'd probably go for Dragon Trail Seaside, as there's a big chunk of it - either side of the chicane of death - by a large stretch of water with lots of boats and some more land (with oddly square tree lines) beyond. If that proved wrong I'd look at others and guess those later.
