Ulkan
Ulkan is the name:
- an urban-type settlement in Irkutsk Oblast (Russia), see Ulkan (location)
- of a tributary of the Kirenga in Eastern Siberia (Russia), see Ulkan (Kirenga)
- a tributary of the Sea of Okhotsk in the Jugdschur Mountains (Russia), see Ulkan (Sea of Okhotsk)