I'll have a go.... if we are talking natural flow then I believe it's possible you'd be within spitting distance of Camusrory, looking towards Knoydart, down Loch Nevis from the top of the conical munro Sgurr na Ciche.
Here the North Eastern slopes of Sgurr na Ciche fall away into a burn that ends up in Loch Quoich, which then flows to Loch Poulary, then down the Garry system to Loch Oich, down the River Oich to Loch Ness and finally down the River Ness to the Moray Firth.
It's a bloody long way West when you consider that you're roughly three miles to Loch Nevis (a Sea loch) from the top of Sgurr na Ciche, the Minch and thus the Atlantic.
It's a possibility, at least. If we're talking all natural direction of flow.....
H