Starting at the Sandstone Quarry trailhead, use the Turtlehead Peak Trail described on the main page until you reach 5,580'. It's very straight-forward from the trailhead.
At 5,580' you will see a dead tree to climber's right of the trail (east) where you will find a use trail heading up to the base of the West Gully, the southernmost gully on the west side. Although at times it may look like you are heading into a rock wall, there is a defined, but loose, trail that tops out at 5,960' just 15' west from the main trail up the North Slope.
If you have information about this route that doesn't pertain to any of the other sections, please add it here.