No water-specific line for Rusty Creek was found in the Region 4 table, so the regional defaults apply: closed to fishing Apr 1 to June 14, trout and char catch-and-release Nov 1 to Mar 31, single barbless hooks required year-round. Treat it as Duncan/Lardeau-side water and do not assume any Duncan River or Lardeau River mainstem exemption, quota or bait allowance applies here. Confirm the current synopsis before you fish.

Rusty runs stream order 3 (still close to the headwater end of the network, on a scale that runs from 1 for a headwater trickle up to 6 or more for a full river) and stretches roughly 4 km, flowing directly into Duncan Lake. Channel-geometry data puts the median width at about 3 m (narrow), the gradient at about 0% in the mapped reach (essentially flat, very gentle), and the peak mean-annual discharge at roughly 0.1 m³/s (very low flow), consistent with a small headwater tributary. The local waterway index carries an inferred, watershed-level fish list for the drainage, including westslope cutthroat, bull trout, rainbow and kokanee, but that list describes the broader west-side Duncan/Lardeau watershed context, not a confirmed catch or survey on Rusty Creek itself. No named-line observation for the creek has turned up in the local fish-record model.

With no direct fish record, no fishing report and no creek-specific guide coverage found, there is nothing yet to promote Rusty Creek as a destination. Reel Adventures Fishing Charters covers Duncan Lake at the lake and charter level, but that does not extend to this creek. If you are already scouting the west-side Duncan/Lardeau drainages alongside nearby Le Beau Creek and Copper Queen Creek (a direct rainbow trout record water), Rusty is worth a look, fished carefully and away from any staging or spawning fish, but plan the trip around access and regulation confirmation first.

The west-side Duncan/Lardeau creeks share a cold-tributary food base: stoneflies, caddisflies, mayflies, midges and terrestrials through the season, with fry and sculpin where habitat allows in the connected basin. No hatch-specific data has turned up for Rusty Creek itself, so treat timing as a starting point rather than a confirmed hatch chart. Where legal and away from redds or staging fish, a small Elk Hair Caddis, Adams, Royal Wulff or Stimulator on top, a Prince, Hare's Ear or Pheasant Tail underneath, and a small Woolly Bugger for fry or sculpin, cover the likely food base.

No public access note, road condition or trailhead has been confirmed for Rusty Creek. Scout it as part of a west-side Duncan/Lardeau trip alongside Le Beau Creek and Copper Queen Creek, and confirm current road and tenure status before heading in.