No individual Gravelslide Creek entry appears in the Region 4 in-season table. Region 4 stream defaults apply: closed Apr 1 to Jun 14, single barbless hook required, and trout/char catch-and-release Nov 1 to Mar 31. Duncan Lake's tributaries carry a bull trout release rule; do not assume Duncan River mainstem quotas or exemptions apply here without checking. Confirm the current Region 4 synopsis before fishing.

Geographical Names BC lists Gravelslide as an official Kootenay Land District creek at 50.505556, -116.953333. It runs stream order 2 (early in the network, on a scale that runs from 1 for a headwater trickle up to 6 or more for a full river) for roughly 3 km before reaching the reservoir. BC Hydro's Duncan Dam monitoring work identifies the Gravelslide Creek fan as a fine-sediment depositional area within the reservoir's drawdown zone, the band of shoreline that goes dry as Duncan Lake is drawn down through the winter and refills each spring.

Provincial fish-inventory data holds no direct records for Gravelslide Creek. The wider Duncan Lake watershed carries bull trout, kokanee, rainbow trout, mountain whitefish and burbot, and Duncan Lake's tributaries in general are managed with bull trout in mind, but none of that is a confirmed record for this specific creek. No fishing report or hatch note specific to Gravelslide has surfaced either. Reel Adventures Fishing Charters guides Duncan Lake at the lake and charter level, not this creek.

If you do fish it, keep tactics simple and low-impact: small-stream dry/dropper and light nymphing with an Elk Hair Caddis, Adams, Royal Wulff or Stimulator on top, a Prince, Hare's Ear or Pheasant Tail underneath, and a sparse Woolly Bugger or fry/sculpin pattern where the creek meets reservoir-edge fry and forage fish. Stay well clear of any staging or spawning fish near the mouth.

No public access point, trail or parking area has been confirmed for Gravelslide Creek. It sits on the Duncan Reservoir drawdown-zone shoreline north of Duncan Lake; anyone working that shoreline should expect unmarked, undeveloped ground rather than a maintained trailhead.