Nelson Riis was born in
High River, Alberta, on 10 January 1942 to Hans and Signe Riis. He attended school in
Longview, Alberta, and
Port Moody, BC. Early occupations included clerk, waiter, fisherman, surveyor, truck driver, timber cruiser, farm labourer, deckhand, and refinery worker. Nelson graduated from the
University of British Columbia (UBC) with a Bachelor of Education (BEd) in 1967 and Master of Arts (MA) (Geography) in 1970. In the late 1960s, he taught in both elementary and secondary schools. In the 1970s, he taught in the newly created Geography Department of Cariboo College (now known as
Thompson Rivers University) in
Kamloops, and held the position of chair of the Social Sciences Department 1970–1973 and 1978–1980. ==Political career==