Corrour station may be a good 15 miles from a 'proper' road but, so long as you have the permission of the Corrour Estate, you can drive all the way to the station on the estate roads - so one up on Berney Arms in that respect.
Certainly about as remote as it gets in terms of being away from it all, as I can attest, having spent a week's holiday at a cottage on the estate many years ago, after arriving by train at dead of night. This was in the days of Class 37s and steam-heat coaches, with the guard telling me to come up to the brake coach after we left Rannoch to get off at Corrour, as the platform was just one coach long. Who needs
SDO▸ ?
But even Corrour might just be shaded by Altnabreac on the Far North line, see
http://en.wikipedia.org/wiki/Altnabreac_railway_stationI have often used Altnabraec as an example of an obscure station with an absurd fare from our
GWR▸ area, and actally took a trip out there from Wick about 8 years ago when I was up there on a Scottish Rover / trip. Memories of lovely weather and fasconating walks from Wick and a town of character. And memories of a remoteness at Altanbraec - ABC - where there's no public road though it can be (and was being) passed 40 yards away on a pretty well built gravel private road, with a side track / walk up to the station.
I understand since then that the station required heavy equipment for upgrade and maintenance works, and that the Network Rail contractor came along with their heavy lorries and were denied access via private land - a big stand-off and something of a feud which looked to be beyond reason - surely they could have found some way of sorting the thing out. Me suspect(ed) that the local landowners didin't actually want a station there, and that the blocking has the objective of keeping it closed.
I have noticed in the Scots press in recent weeks stories about a chap who owns a big old pile in the flow country - the huge elevated flat boggy area with an awful lot of water - and about his brushes with the law, and (please correct me if I'm wrong) being detained at her majesty's pleasure and having various restrictions put on him with regards who may be emloyed or visit. I hadn't really considered this as part of the rail story, but I got a very odd look from a train manager I was talking to yesterday, and it seems that Altrabraec station is so remote and that it was the only way "in" without a car that a noticable proportion of the passengers to and from were travelling for the purpose of the activities associated with or similar in drift to the gent reported by the papers.