How to Reach Flame Peak and the Forge of the Giants
From Zamor Ruins, cross the Mountaintops toward the frozen lake and Giants’ Gravepost, then follow the southern ridge to Fire Giant and the Forge.
Flame Peak is the volcanic southern section of the Mountaintops, beyond the frozen lake and Giant’s Gravepost. Follow the main route east and south toward the Forge of the Giants; the Fire Giant guards the final approach. This is the main-story path onward to Crumbling Farum Azula, so finish any optional Mountaintops exploration before using the Forge.
From Zamor Ruins, cross the Mountaintops toward the frozen lake and Giants’ Gravepost, then follow the southern ridge to Fire Giant and the Forge.
Defeat the Fire Giant, rest at the Forge of the Giants, and choose Melina’s prompt to burn the Erdtree; the story sends you to Farum Azula.