That fish is not all that unusual for some of the more productive southern Vancouver island lakes. There are fish nearly that size caught every year in lakes like Langford, Prospect and Elk Lake. There would be many more produced, but as the previous poster pointed out, the stocked fish usually never make it past their first summer in the lake and the lakes are overstocked to compensate. It could also be that the fish was from broodstock released from the Duncan hatchery, (it would be easy to find out – just open up the fish, the presence of gonads would be a dead giveaway). I know that a large number of Tsitika steelhead brood left over from the ill-conceived “living gene bank” program were released in one of the island lakes last spring. That would make for a challenge on light tackle - especially if they had been in the lake long enough to get into better shape.