From WoWWiki

Coldridge Pass links Coldridge Valley to the rest of Dun Morogh, and is crucial to give the trickle of dwarven and gnomish recruits to the frontier town of Kharanos. Unfortunately, the pass has recently become infested with troggs, and the only chance for travelers to get through is either to run at top speed or slash their way through the hostile invaders.

Subzones of Dun Morogh

Amberstill Ranch • Anvilmar • Brewnall Village • Chill Breeze Valley • Coldridge Pass • Coldridge Valley • Frostmane Hold • Gates of Ironforge • Gnomeregan • Gol'Bolar Quarry • Gol'Bolar Quarry Mine • The Grizzled Den • Helm's Bed Lake • Iceflow Lake • Ironband's Compound • Ironforge • Kharanos • Misty Pine Refuge • North Gate Outpost • North Gate Pass • Shimmer Ridge • South Gate Outpost • South Gate Pass • Steelgrill's Depot • Thunderbrew Distillery • The Tundrid Hills