This line threads a surprisingly gentle needle through otherwise improbable terrain. It’s also one of the longest runs in Great Gulf. Due to having a more easterly aspect, this line and others in the area can corn up earlier in the morning than the N/NE facing terrain further up the ridge. The bottom of this line burns out earlier in the spring than others in the Great Gulf. So plan on a March or early-mid April descent for this line. Hike past the top of Pipeline to the col between this, and the true summit of Mount Clay. Ski a blind, low angle snowfield, to the edge of a convex roll. Part of the reason this line gets the name Hidden Hallway is because you can’t see the line in its entirety from anywhere in the range, except inside it. As you near the edge, a long narrow gully should reveal itself. Ski this to a junction. From here. The line blends into a series of skiers left trending ramps. Ski the first ramp to a construction. In late season this can blow out into a water hole. In this case, you can skirt it to skiers right. Either line you take, follow the next ramp until it peters out into an ill defined gully. While it’s tempting to try and traverse right through the boulders, for the best exit, ski straight down this bushy drainage, which slowly transitions from skiing to bushwhacking. Ski out of the woods directly to Spaulding Lake, and skin easily back to the bottom of Airplane Gully. Those who have tried to cross the boulder field have reported regrets.