Pekwachnamaykoskwaskwaypinwanik Lake

From the Wikipedia article (permalink):

Pekwachnamaykoskwaskwaypinwanik Lake is a lake of Manitoba. The name is Cree for “where the wild trout are caught by fishing with hooks.” It is the longest place name in Canada at 31 letters long. It is located just southeast of Red Sucker Lake in northeastern Manitoba, near its border with Ontario.

I don’t know how Cree separates its words into syllables, but one possibility is this:

  Pek-wach-na-may-kos-kwask-way-pin-wa-nik Lake

It wasn’t tagged on OpenStreetMap, so I created an account and added the name. Here it is.