Nalivkin piryakhest dar shimolu garbi Pomir, shokhai rosti piryakhi Fedchenko. Havzai piryakh dar nishebii janubi kuhi Krutoy Rog va nishebii shimoli kuhi Aral (shokhahoi qatorkuhi Tanimasi Shimoli) voqe gardidaast.
Navilkin az qabili piryakhhoi murakkab buda, 8 piryakhro dar bar megirad. Tulash 13,5 km, masohati umumiash 45,2 km2, hajmi yakh 8,6 km2. Balandin nuqtai poyonii piryakh — 4450 m, boloiash — 4865 m; balandii khati barf 4700 m., Piryakhro bori avval soli 1928 ishtirokchii ekspeditsiyai 1-umi Pomiri AF ITTIHODI ShURAVI, topograf I. G. Dorofeev tadqiq kardaast.