My OS 1:50 shows the track finishing at NH 633 188 but 1:25 shows it continues E for about 1km before heading north. Nothing visible on satellite, Bing Birdseye and no recent pics on Geograph. Anyone know what happens on the ground?

Vanessa - this whole area is being torn up with construction trax - but . . . moving across the watershed is no hard - in good weather just rock on, and in bad times a bearing ESE from the estate hut at NH 633 187 will soon bring you over into the basin formed by the upper reaches of the Allt Odhar Mor (Dappled stream, what a sweet name!) and so to the Findhorn. It's a snap. You've got about twenty minutes over relatively good ground - no peat hags, but can be a tad damp underfoot. Once you're at the watershed your way is absolutely clear to view.

The first 300m moving NE from the hut is now an access track. After this, as I said above, the ground, tho' soft, is no problem.

If, however, yr heading for Glen Mazeran, then as you hit the watershed you come across a line of old iron fence-posts - use these to make yr way NE between Carn Ghriogar (Cheese Rock - what that in the world this be as a name?) and Beinn Braec Mor (Big Deer Hill) and so gain the glen.

Thanks, Humphrey. ESE it is. Reassuring to know that underfoot is not as bad as it looks on aerial view.