There is a sign on the last point on the right as you pass out of the illwill embayment (past the lodge heading towards Sulphur). That sign indicates where the line is. From there it sort of splits the second Lilydale island. There is a sign on the southern side of that island. From there, it cuts across that bay. I can't find a sign on the southern end and my reference point is somewhat vague, so I won't try to describe that part. Rick Hise may be able to clear that up if he sees this topic.
Hope this is somewhat helpful.

Mike