Map 6 of Maps of SEA in the 1960s

Entering Laos 50 miles southeast of the Nape Pass , the roads through Mu Gia were the main routing of the Ho Chi Minh Trail.  The Mu Gia Pass was the most dominant, geographical feature of the panhandle region.

North of Mu Gia, Route 15 wound a twisting, turning course through the upper levels of the Annamite Mountains .  Near the border, however, the road dropped into a narrow canyon leading down to the lower valley on the Laotian side.

Mu Gia's canyon was truly dramatic.  On the northwest side of the valley floor, the Nape Plateau rose abruptly for 2,000 feet.  A few hundred meters east of the roads, hills jutted up for more than 2,500 feet, with nearby peaks reaching over 4,000 feet above the road bed.  Mu Gia was a classic example of what theorists pictured when they talked of "chokepoints" in a logistics network.