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FATMAP difficulty grade
Instead of going all the way to Chasm Lake, stop at the privy.
From here you're going up the gully to the south, that follows the bottom of the Ship's Prow.
There are usually ice falls at the top, which means you've got to use the ledge system to looker's left of it.
It's easy to spot from the bottom, but much harder to find from above.
You may have to remove skis to get around the crux boulder in the middle of the ledge.