A creek in the Upper Arrow Lake watershed, a tributary of Illecillewaet River. Fish are expected here, though it carries no direct inventory records yet.
Updated July 27, 2026
Wildfire & Access
BC Wildfire Service · live around Clachnacudainn Creek
It flows into Illecillewaet River within the Upper Arrow Lake watershed (Upper Arrow Lake → Columbia River). It runs stream order 4 (mid-range in the network; the scale runs from 1 for a headwater trickle to 6+ for a river) and roughly 9 km. Bull Trout, recorded here in provincial fish-inventory data. The fish-passage model expects Westslope (Yellowstone) Cutthroat Trout here too, since the reach is reachable with no barrier between, though there is no direct record yet.
The fishing
As a small stream, a tributary of Illecillewaet River, Clachnacudainn Creek fishes the way creeks of its size do: short drifts with a buoyant attractor dry over a light dropper, working the pocket water and the heads of pools. Match the fly box to the season and confirm against a current local report.
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Tributary Creek
Upper Arrow Lake watershed
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Stream order 4
~9 km
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Bull Trout
recorded
Access & the rules
Access for Clachnacudainn Creek, meaning the roads in, put-ins and any walk-in or seasonal limits, is worth confirming locally before you commit a day. The drainage map shows how the water sits in its valley.
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Before you fish
Confirm the current BC freshwater fishing regulations (Region 4 – Kootenay) before you go This water is part of the Illecillewaet River system.. Official synopsis: gov.bc.ca fishing regulations.
