your best bet is fishing the athabasca river by the water treatment plant by the bridges in town or the mouth of the poplar creek and athabasca, you will have to take a quad or walk the 2km to the mouth though.
There are also a few trout ponds, two on highway 69 (airport), take a right at the auto wreckers sign to get to the better one. And one on 63 about 10km south on the right hand side with small rainbows and perch.