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To access the Major Tom couloir, park at the Neff's Canyon trailhead in Olympus Cove.
Follow the old road grade up into the canyon and take the left branch to head up into the main drainage of Neff's.
The trail is narrow with overhanging trees and opens up into a junction.
Take the path to the right into the woods and into Thomas Fork.
There is an old summer trail you can follow that gains a sub ridge, and follows it into the upper reaches of the canyon.
Once you enter the upper bowl of Thomas Fork, continue to the S, winding up through the pine forest cutting switchbacks until you gain the ridge.
From there head E along the ridge keeping an eye on the S slopes, until you come to what is clearly the start to the chute.