So what’s with Dryden Lake? I think google map isn’t quite correct [...]
I'll have to have a look at it. It looks to me like Middle River starts near the end of their driveway, where it is fed by several creeks. I have no idea why they would mention Dryden Lake as the starting point. There's a couple creeks that join up near their driveway and then they join up with another creek coming from Lansdowne Lake.