... by scheduling the 10km Championships and Half Marathon Championships a day apart on opposite sides of the country:
Canadian 10km Championships - May 28 Ottawa, ON
Canadian Half Marathon Championships | Calgary - May 29 Calgary, AB
http://athletics.ca/2016-athletics-canada-fixtures/#sthash.7xr3xZt4.dpbs
Given the talent pool Canada has. most athletes who could contend in one could easily contend in the other. Sad to make participation in both impossible (actually impossible since the 10km is a night race).