After making your way to the Frozen Gorge Base Camp, as shown in the previous section, exit through the opening beyond the campfire and turn left.
Squeeze through a narrow gap in the rocks.
Jump across the wide gap in the ledge.
Then scramble up the wall on the left to grab a narrow ledge.
Traverse around to the right until you can climb upward, then right some more.
Jump up and latch onto the climbable wall with your axes. Then climb upward, jump across the gap to the next climbable area on the right. Then continue to the ledge above.
Cross a narrow stone bridge above the canyon.
Take a running jump to latch onto the next climbing wall.
Climb down and around to the right for your first glimpse of the tomb. Then continue to the right until you can drop down onto a flat, snowy ledge.
Move to the far end of this ledge and jump to grab a handhold on the cliff face ahead.