There is no fishing report, hatch report, current access note or creek-specific guide coverage confirmed for Harry Creek. Treat it as scouting and regulation-confirmation water: worth a look if you're already working the Duncan Reservoir shoreline, but not a water to plan a trip around until a survey or field report fills in the fish, access or habitat picture.
Where the reservoir-edge habitat supports it, expect the same general food base as neighbouring Duncan tributaries:
stoneflies,
caddisflies,
mayflies, midges,
terrestrials, connected-basin fry and
sculpin. No hatch or diet data specific to Harry Creek has been confirmed, and no fly recommendations are made until that changes.
Reservoir influence
Duncan Dam and Duncan Reservoir operations shape fish habitat and life-history success across the Upper Duncan system, which is why the Okanagan Nation Alliance and BC Hydro monitor tributaries like this one even without a confirmed sport fishery. Handle any tributary here conservatively, especially near staging or spawning fish.