Abstract: The present study was undertaken to assess the geomorphological parameters of Tons river of Uttarakhand State, India which is largest tributary of the Yamuna river and flows through Garhwal region in Uttarakhand, touching Himachal Pradesh. A total of 500 m of area was selected for estimation of various geomorphological features which includes river width, river depth, width-depth ratio, entrenchment ratio, water-current velocity, substrate type and channel type. Width of the river was reported maximum while depth was minimum at site-II. Width-depth ratio was reported maximum at site-II. The maximum mean value of entrenchment ratio was also observed at site-II thus according to the Rosgen system of river/stream classification, the river under report is slightly entrenched. Site-I was reported with boulders, site-II with large and small boulders cobbles, pebbles, sand, silt and clay and site-III with cobbles, pebbles, silt, sand and clay as dominating substrate along with other organic and inorganic matters.