I'm guessing Fish Creek is not open until June 16th?
http://www.albertaregulations.ca/fishingregs/es1.html
B. For other ES1 Streams, and tributaries, not included under (A) and for fish species
not mentioned at a listed stream.

June 16 to Aug. 31 – Trout limit 2; Cutthroat and Rainbow over 35 cm; Mountain Whitefish limit 5 over 30 cm; (where present, Walleye limit 3 over 50 cm; Pike limit 3 [no size limit]; Perch limit 15; Lake Whitefish limit 10; Burbot limit 10); Bait Ban.