He then served as an artilleryman, gunner, took part in battles in the Leningrad and Volkhov fronts, in Karelia and on the Far East.

After demobilization in 1945 he entered the Leningrad Institute of Painting, Sculpture and Architecture named after Ilya Repin, where he studied of Victor Oreshnikov and Andrei Mylnikov.

In 1951 Boris Ugarov graduated from the Repin Institute of Arts in Igor Grabar workshop with the rank of artist of painting.

In 1982 Boris Ugarov was awarded the honorary title of the People's Artist of the USSR.

His paintings reside in State Russian Museum, State Tretyakov Gallery, in art museums and private collections in Russia,[4] Japan, Ukraine, France, England, Germany, Italy, in the U.S.,[5] and others.