I was fishing in the Haliburton area a few days back. The water is still relatively cold (70-72 F) for this time of year and I haven't found an established pattern yet, and have found the smallies to be scattered. I've traditionally had softwater success vertical jigging for lakers at my ice fishing spots and decided to stop and see if I could mark anything while moving from one smallie spot to another. I was sitting over 75' of water when I heard a fish break the surface out in deeper water, followed by another splash soon after, so I headed in that direction and marked a school of herring or smelt about 15' down over 130' of water. Hearing another splash, I threw a smoke/white laminate tube in that direction and bang, a nice hit. It honestly felt like a laker with a few good tail pumps and some digging toward bottom, but it turned out to be a nice fat 19" smallie who must have been out chasing dinner in the open water. It's certainly the deepest water depth I've caught a smallie on.