The Nazahezan Mountains is the biggest (not highest) mountains-area of Phaluhm Phoueck. It is coterminous with the Nazahezan Mountains electorate, consisting of 5 wards: Passalam, Busan, Dexalam, Thywen and Mountains West.
While the Tamblay Mountains have higher peaks, the Nazahezan Mountains have a larger area. The highest point of the area is Mount Liko at 1,171m. Lower areas include Dexalam (703m), Jarat Hill (664m), Busan (640m) and Passalam (590m).