It follows the crest of the Brooks Range from the Seward Peninsula, then bends south into the Yukon and follows the Rocky Mountains and Sierra Madre Mountains south into South America.
ມັນປະຕິບັດຕາມລະດັບຂອງ Brooks Range ຈາກ Seward Peninsula, ຫຼັງຈາກນັ້ນໂຄ້ງລົງໄປທາງໃຕ້ເຂົ້າໄປໃນເມືອງ Yukon ແລະຕິດຕາມພູ Rocky ແລະ Sierra Madre Mountain ພາກໃຕ້ເຂົ້າໄປໃນອາເມລິກາໃຕ້.