Where is Cyclops Valley?

[Kesler]

I heard you need a boat but where on the map is it? East/west etc..

[Ripplinger]

It's along the west wall in T2A lands, here's a map of it.

Pretty sure that recently it was fixed again so you could teleport down into the valley from the ledge just south of it. So you could get there and mark a rune without the expense of a boat.