East Rapti River should not be confused with West Rapti River.
| East Rapti River | |
| Native Name: | Nepali: पूर्वी राप्ती नदी |
| Source1 Location: | Mahabharat Range |
| Mouth Location: | Narayani River |
| River System: | Ganges |
| Tributaries Left: | Samari, Karra, Kukhreni, Reu, Panchnad |
| Tributaries Right: | Lothther, Manahari |
The East Rapti River flows from east to west through the Chitwan Valley in Nepal, forming the northern border of the Chitwan National Park. It joins the Narayani River inside the protected area.[1]