From Bushwalk Australia
See Mount Ossa Info for further access info. The track starts from Pelion gap on the Overland track. From here to the summit takes around 1hr each way. The track is well defined until the higher reaches where one needs to pay attention to cairns marking the route. A gully in the middle is the marked route to the top. Climb up a ledge 2m high on the left side of the gully, then cross a ledge. A further short scramble leads to the compact summit. A very worthwile side trip.