Glenn Howarth was born in 1946 in Victoria, British Columbia. Howarth completed his Bachelor of Fine Arts at the University of Victoria in 1970. He also completed further studies in Europe later in life.
He worked as an art critic for the Montréal Star and in 1971 for the Victoria Daily Times.
Howarth settled in Victoria British Columbia and began to paint full-time in 1973.He became a member of the Royal Canadian Academy of Arts in 1978.
In the early 1980's, Howarth became interested in the use of computers for artistic expression. In 1983 he was chosen as Canadian Commissioner at the XVII Sao Paolo Biennale, his works were shown along with three other Canadian computer artists.
Howarth taught extensively across Canada, for many years he was an instructor at the Victoria College of Art and Design.
His work is part of the collections as the Art Gallery of Greater Victoria, the Vancouver Art Gallery, the Glenbow Museum, the Canadian Broadcasting Corporation, and the University of Victoria Art Collections, among others.
Later in life Howarth painted many scenes of British Columbia, often depicting social meetings and activities, as well as nudes delicately placed in expressionistic landscapes.
He died in 2009.