From Harman Pass

Climb directly from Harman Pass by ascending to the stepped ridge of the Main
Divide via the screes and snow slopes leading from the pass. Easy climbing
prevails to the Low Peak (2013m), followed by a steep, razor sharp descent to
the saddle between the peaks. Once on Mt Isobel’s high peak it may be
prudent to continue south, descending on snow slopes to Whitehorn Pass.