In reply to Parrys_apprentice:
The track is in Vol 2 of Vertebrate's Wild Trails MTB guide with a possible return via the track leading to the halfway lochan. It's more aimed at MTBers though. I'd say you'd be better off walking unless you are decent at bunny hopping water bars. You aren't likely to save much time on the way in though you should (depending on your skill negotiating water bars) on the way back.