Abstract: The research work was conducted on Aba-midan sub water shed, which is located in the Bambasi District of Assosa Zone in the Benishagul Gumuz Regional State to characterize and to classify the soils along toposequence. Three pedons along toposequence were studied. Aba-midan sub watershed is located between 09°49’ 98.9’’ and 09°49’89.3’’ N latitude and between 34°42’ 31.8’’ and 34°42’50.3’’E longitude, with altitude ranging from 1443 to 1491 m.a.s.l. The soils were generally dark reddish brown to dark red colour and shallow to moderate soil depth. Almost very friable consistency, with bulk density ranges (1.14 to 1.49 gm/cm3), prismatic to sub angular blocky structure, low total porosity indicated that the soil has poor physical condition for plant growth.