The topography of Pasighat is predominantly comprised of low rolling hills and riverine plains. Sitting at a relatively modest elevation of 155 meters (509 feet) above sea level, the terrain is gently sloping, dipping southward toward the Assam plains.
The most striking topographical feature is the Siang River valley, which cuts through the hills, creating steep forested banks to the north that gradually open up into wider floodplains near the city limits. Minor streams and tributaries crisscross the terrain, feeding into the Siang. While the city proper sits on relatively flat to gently undulating land, it is immediately ringed by the steeper hills of the Himalayan foothills.
