The longest continuous gully in the Presidential Range. Mother In Law is an unfortunately ephemeral line. Usually scoured down to rock, when it’s in, this line is a real treat. From the Wilderness Boundary sign, drop in and ski consistent turns with a really cool perspective of the other Great Gulf lines. Pick your way around some talus to gain the next good section as ski this all the way to the bottom of the Great Gulf. One final steep section at the bottom can sometimes present a water hole in late spring. Either hike out the way you skied in, or ascend Airplane Gully to exit. As with all Great Gulf lines, there is no realistic exit out the bottom in winter. In the event of an emergency, your only exit is likely in a helicopter.