Falrun's 2nd Edition Dungeons & Dragons RPG RPGs PBP Pathfinder / D&D The Watcher from the Aether says...
Ardo frequently scouts the area as the party rides their camels across the desert, following the merchant caravan route. The guards that the party hired do an adequate job of keeping the party on track, but they lack any in-depth knowledge of the area.
Along the way, Hafer explains that he lives a couple of days journey south of Braliar and goes on to explain that a thousand years ago, the desert was much more livable, before the river dried up.
Late on the third day, the party arrives at the entrance to Northknife Pass. Rising abruptly from the wide valley within which Bralizzar lies, The Dustwall forms a formidable barrier. In the sunlight, the dead-grey rock is streaked occasionally by glistening red, as though the mountains had been wounded. The mountain tops disappear in writhing mists, and their feet are hidden by clouds of swirling dust.
Like a cleft carved by a gigantic axe, Northknife Pass cuts through this imposing barrier. From Bralizzar, the trail climbs slowly up the valley to the foot of this high pass before heading toward the mountains. When it begins its climb, it follows the course of a rushing stream that cascades from the heights above. In switchbacks criss-crossing the face of the mountains, the trail wends ever upward, seeking to scale the heights slowly enough to make travel possible. Passage through The Dustwall Mountains will be formidable, indeed.