No Johnston Creek-specific exception is listed in the checked Region 4 tables, so default Region 4 stream rules apply: closed Apr 1 to Jun 14, trout and char catch-and-release Nov 1 to Mar 31, and single barbless hook year-round. BC has more than one official Johnston Creek, so confirm you are reading the Lake Windermere water before applying any exception you find elsewhere. Confirm the current synopsis before you fish.

The creek's mapped mouth sits at 50.43250, -115.97194. BC water-quality material on Windermere Lake lists Johnston among the lake's main tributary watersheds, so its lower reach belongs in the broader lake-edge habitat picture even without a dedicated trout-stream record. No channel-geometry survey (width, gradient, discharge) has been logged for Johnston Creek itself, and no stream-order or length figure is on record, so treat it as a small, unmeasured lake feeder until that data turns up.

Local beat data holds two direct redside shiner records at Johnston Creek and no direct trout observations, which is a thin signal against Windermere's wider fish assemblage of trout, char, kokanee and whitefish alongside sculpins, suckers, bass, dace, pikeminnow, peamouth and redside shiner. That puts Johnston in the same category as nearby Holland Creek: forage and scout water first, not a destination fishery, until access, flow and fish presence are confirmed on the ground.

If a legal, cool-water reach turns up, keep patterns small and forage-matching for the shiner-dominated food base: tiny soft hackles, Hare's Ear, Pheasant Tail, Elk Hair Caddis, a small Adams and micro fry patterns fished away from any spawning fish. The lake-edge food base here likely runs redside shiner, other baitfish and fry, chironomids, small mayflies, caddisflies, midges, damselflies and summer terrestrials.

Public access, land tenure and a reliable parking or trailhead point along Johnston Creek are unconfirmed. Kootenay Troutfitters is the nearest Columbia Valley guide contact, but no source confirms guiding specific to Johnston Creek.