Speak to Leif Tenderton at -2401, -675, -180 in the Sanctuary of Waning to begin this quest.
Find a way through Holgresh Pass. The pass starts at -1603, -604, -1260 and the update for this step is around -498, -673, -425 , near the Tears of Tunare. If you choose to fly through beware of the holgresh on the upper branches.
Find Elder Kionn at -18, -633, -727 in the Sanctuary of Tears. The quest will automatically complete as you approach.