From the parking at le Laus head uphill to the point at which the road is shut, then skin up the road on a ski de fond track. Follow this up towards the Col d’Izoard until you reach 2117m. Then head west until you reach a plateau with two wooden buildings. Continue heading up the Percagne in westerly direction until around 2400m, then head north to climb up to the Col des Peygus.
Follow your tracks back to the ski de fond track and then stay on that to the parking.