No water-specific exception is listed for Larchwood Lake, so the Region 4 regional defaults apply: trout/char daily quota 5 (no more than 1 rainbow or cutthroat over 50 cm, and only 1 bull trout of any size), and a freshwater licence is required for anglers 16 and over. Confirm the current rules in the official synopsis before you fish.

The lake's official waterbody identifier places it in the St. Mary River drainage. A 1961 provincial survey measured it at a maximum depth of 10.1 m and a mean depth of just 2.9 m, with Secchi-disk clarity to 4.9 m, deeper than the lake averages. In practice that means the water column is clear from top to bottom across most of the lake: there is little of the murky, stratified deep water that pushes fish out of casting range in summer, and shallow-water tactics stay productive for more of the season than on a deeper, greener lake.

For an angler judging whether the fishing is worth the drive, the stocking record is the fishing report. Larchwood Lake carries a put-grow rainbow trout program: 69 recorded releases between 1958 and 2026, totalling more than 220,000 fish, entirely rainbow trout. The modern pattern (2016 onward) is a steady 500 Pennask-strain yearlings every spring, occasionally topped up with a batch of already-grown Fraser Valley "spring catchable" rainbow (2023 and 2025) for anglers who want fish in hand sooner rather than fish that need a season to grow into the net.

A shallow, clear, put-grow lake like this fishes on classic small-stillwater lines: chironomids under an indicator over the shoals, and leech patterns worked slowly along any drop-off, are the standard starting point for rainbow holding over chironomids and leeches, the everyday forage of small BC put-grow lakes. Because the whole lake sits within the clarity band the 1961 survey recorded, there is no obvious need to fish deep water that the fish can't be seen in; work the shallower structure first and confirm current local reports before committing a day.

Larchwood Lake sits south of Torrent Creek in the Rocky Mountain Trench portion of the East Kootenay. Launch, road and parking details are not yet confirmed; check locally before hauling a boat in, and be ready to fish it as a shore or small-craft water given its size.