Basically, there's a small patch of water, and behind it is a very strong hero. You can't run through the corridor where he stands in one go; he'll catch you. Either with boots or a spell, when you cross this section, an event stops you, and you spend the night on the water without a boat.
Found it!
An event on the water (4x52x0) tells the Hero, "A remarkably inquisitive mind suggests that you should stop here and wait."
There's a difference:
- on my map, scouting works first, then logistics; otherwise, you won't be able to reach the other shore;
- for Asmozz, scouting and logistics aren't needed; you can run across immediately (a narrow corridor, but it doesn't lead anywhere; it feels like you need to defeat the green Dragon Hero).
iskatel78, what is the purpose of visiting the island where the Dragon Hero is located?