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It's belonging to the Snow Mountains of which it's the most northern west corner.
This region has two different zones.
The first is the outer part, at east and south, that isn't different from the Snow Mountains. You can access either by the east, from the plateaus above the blue Obelisk, or by the south, from the Tundra then heading north. There are giant Sequoias on which you can built Tree Platforms and lay Tree Sap Taps.
The most interesting zone is hidden in a cirque made by ice spires. You find entrances both in northern east and south, under the spires. It's very rich in rare resources (see below) an offers a highly defendable, enclosed area with enough room to construct a small city inside. It also seems to have no creature spawns there.
Being surrounded by ice, it is obviously quite cold, but not terribly so, the maximum temperature recorded being 41 °F (5 °C), so pick-up a Fur suit.
From Local Creatures
The "Grand Glacier" means Big SnowCap in French, or more simply "Big Glacier".