Over-all exploration activity in western Canada in 1963 showed a moderate increase over 1962. Geologic work remained at about the 1962 level, but surface mapping continued to decline sharply. Devonian reefs of west-central Alberta and northeastern British Columbia accounted for most of the significant discoveries and exploration interest. The Edson, Mississippian gas discovery of 1962 in southwest-central Alberta was extended to major proportions. Comparisons are made with 1962 activity.