Arrived at Monggis Substation of Kinabalu Park on the 11th July 2016. Trekked to for 8hours to Musang Camp, a 10km distance, on the 12th July 2016 and camped there for the night. Summited Tambuyukon Peak on the 13th July. Our record time from Musang Camp to the summit was 3 hours 15 minutes. Descended to Musang Camp and put up there for another night. Descended to Monggis Substation on the 14th July 2016 by 1200 hour (our record time was 4 hours 16 minutes). The difficulties of the climb were the steep and slippery trails, going through mossy tree roots which pose high risks to injuries for climber, jagged rocks, insect's stings and off course leech bites.