The Vermilion River sits entirely inside Kootenay National Park, so it runs on Parks Canada rules, not the BC Region 4 synopsis. Parks Canada has closed every waterbody in Kootenay and Yoho national parks to watercraft and angling until March 31, 2027 to slow the spread of aquatic invasive species, including whirling disease. When park waters reopen, fishing there needs a Parks Canada fishing permit (a BC provincial licence does not cover national park water), and national-park possession limits run near zero for most native species. Confirm current status on the Parks Canada Kootenay fishing page before making any plan around this river.

The BC Geographical Names Office places the river's mouth at roughly 50°49'30"N, 116°00'19"W, where it flows south into the Kootenay River near Kootenay Crossing. Upstream, it rises at Vermilion Pass on the Continental Divide, the boundary with Banff National Park, and runs the length of the Vermilion Valley alongside Highway 93 South, the Banff-Windermere Highway. Its named tributaries include the Simpson River, Tokumm Creek, Ochre Creek, Numa Creek and Verendrye Creek. Tokumm Creek carves Marble Canyon just above where it joins the Vermilion, and Ochre Creek feeds the Paint Pots, the park's ochre-stained mineral springs, before the two meet the main river. Numa Falls, by contrast, drops directly on the Vermilion itself, a short walk from a roadside pullout south of Marble Canyon.

At stream order 7 (mid-to-large in the network, on the 1-to-6+ scale from headwater trickle to full river) and roughly 71 km long, the Vermilion carries real volume: median channel width ~40.8 m (broad), median gradient ~0.26% (very gentle for a Rocky Mountain river fed by glacial meltwater), and a peak mean-annual discharge of ~25.4 m³/s (strong flow). That combination of width and gradient reads as classic drift or big-water wade fishing, not a mountain creek, despite its high alpine start. Bull trout, rainbow trout, dolly varden, mountain whitefish and brook trout are all modelled as reachable habitat in the connected Kootenay network, but no direct fish-inventory record exists for the Vermilion River itself yet.

None of that matters for a trip right now. Parks Canada has closed every waterbody in Kootenay National Park, the Vermilion included, to watercraft and angling until March 31, 2027, to slow the spread of aquatic invasive species and whirling disease. Treat this page as a read on the water for when that changes, not a place to plan a cast around today.

For the record, the physical profile fits a cold, glacially fed bull trout and rainbow river: wide runs and seams over a broad low-gradient channel, the kind of water that would fish well with a dry-dropper through the warm months and streamers or deep nymphs once flows drop in fall. No local hatch survey or fishing report exists for the Vermilion itself, so treat any fly recommendation as a regional guess rather than a confirmed pattern; the nearby Elk River/Fernie hatch calendar in entomology hatches 2026 06 runs stoneflies, mayflies and caddisflies through summer, but that water sits far lower and warmer than this glacier-fed valley, so dates won't transfer directly.

Highway 93 South is the only way in, and it runs the whole valley. From north to south: Vermilion Pass marks the headwaters at the Continental Divide, Marble Canyon has a day-use area and campground with the trailhead into the Tokumm Creek canyon, the Paint Pots trailhead sends a short flat trail to the ochre mineral springs on Ochre Creek, and Numa Falls is a roadside pullout a few minutes' walk from a waterfall on the river itself. Kootenay Crossing, further south, sits near where the Vermilion joins the Kootenay River. None of these are fishing access points while the closure is in effect; they're trailheads and viewpoints along the highway corridor. No guide coverage specific to the Vermilion River was found, which tracks with a multi-year angling closure.