I found this gray sock on the Richea Creek track, in Mid-January.
It probably belongs to a group of three men who were doing a prep hike to Lake Rhona in anticipation of their Overland track walk later this year.
It was probably on the outside of a pack and got torn off in the scrub.
I was the solo walker that made the pathetic joke about the carpark being the secondary/overflow car park for Mt Field.