This page explains how to start and complete the Secret of the Snowy Peaks shrine quest.
How to Start the Quest
Go to Wasteland Tower, then go southeast along the mountains. Continue traveling southward on the mountaintops to reach Mount Granajh. On top of Mount Granajh, read the diary in the ruined cabin to start the shrine quest.
How to Complete the Quest
Check the Suma Sahma Shrine page for details on completing the quest.