British Columbia — Steelhead
Fishing the Thompson River: BC's Storied Steelhead Waters
For much of the twentieth century, the Thompson River drew fly anglers from across North America seeking autumn steelhead in a canyon landscape of sage and rock. Understanding what this river offers today — and what regulations govern access — begins with knowing the water.
Thompson River, Thompson-Nicola Regional District, British Columbia. Photo: Giorgio Galeotti / Wikimedia Commons (CC BY-SA 4.0).
Current Status: As of 2026, Thompson River steelhead remain under a conservation closure for all retention. Catch-and-release only applies in open windows. Always check current BC Freshwater Fishing Regulations before fishing.
The River and Its Geography
The Thompson is the largest tributary of the Fraser River. It forms from the confluence of the North Thompson and South Thompson rivers at Kamloops, then flows westward through an increasingly arid canyon before joining the Fraser at Lytton, approximately 130 kilometres downstream. The lower canyon — the stretch most associated with steelhead fly fishing — passes through a semi-desert landscape of clay benches, ponderosa pines, and basalt walls. Elevation drops steadily, and the river runs fast and clear during the autumn fishing season.
The lower Thompson supports two distinct runs: a summer-run population that enters fresh water from June onward, and a larger autumn-run population that arrives from late September through November. Historically, the autumn run drew the most angling attention, as fish were visible in accessible pools and responsive to swung flies.
Productive Stretches
The river from Spences Bridge downstream to Lytton held the most documented angling water. Several pools in this reach — recognizable to anyone familiar with older angling literature — produced consistently when fish were present. The canyon walls force the river through narrower channels in several places, creating hydraulic features that hold resting steelhead.
The Spences Bridge area has historically been a reference point for anglers accessing the lower canyon. Highway 1 parallels much of the river's length through this section, providing road access to multiple entry points. Public access varies by parcel; some stretches adjoin Crown land while others border private agricultural holdings.
Above Kamloops, the South Thompson flows through a broader, more agricultural valley. This section is not associated with steelhead but supports resident rainbow trout populations. Small tributaries entering the South Thompson hold brook trout in some areas.
Seasonal Windows
Summer-run steelhead enter the Fraser system from June through August and hold in deeper, cooler pools during warm months. By late September, water temperatures in the lower Thompson typically drop into the range that brings fish up into shallower, swifter water where swung flies are most effective. October is the traditional peak of the autumn fishery, with fish present into November in most years.
Winter months bring low flows and cold temperatures. The river can produce fish through December in years when populations are sufficient, but regulatory closures and conservation concerns have increasingly limited winter access.
Thompson River at a Glance
Length: Approximately 489 km from headwaters to Fraser confluence
Lower canyon reach: Spences Bridge to Lytton (~45 km)
Target species: Steelhead (wild), resident rainbow trout
Traditional peak: Late September through November
Regulations: Catch-and-release only; check current BC regulations for open periods and gear restrictions
Nearest services: Spences Bridge, Lytton, Cache Creek
Fly Selection and Presentation
The Thompson's clarity and relatively moderate depth make it a river where fly visibility and presentation angle matter. Traditional patterns — tied on large hooks and designed to swing across the current — have a long association with this water. In the clear, cold water of autumn, smaller, sparser patterns tied on lighter wire hooks have also worked effectively.
Swinging a wet fly or spey fly on a downstream angle has been the dominant technique on the lower Thompson. The river's pace through the canyon sections allows a fly to work through a substantial arc before needing to be lifted and recast. Two-handed rods give reach and allow longer casts from confined gravel bars.
In lower flows, particularly later in autumn, a more cautious approach is warranted. Fish in clear, shallow water are easily disturbed by wading pressure or repeated casts over the same lie.
Current Conservation Context
Thompson River steelhead have experienced significant population declines since the 1990s. Fisheries and Oceans Canada and the BC Ministry of Forests have documented reduced returns over multiple decades. The population is listed under Canada's Species at Risk Act review process, and retention fishing for steelhead has been prohibited for an extended period.
Conservation organizations including the Thompson-Nicola Fly Fishers and the Steelhead Society of BC have advocated for stronger protections and habitat restoration measures. Anglers fishing the Thompson today do so with an awareness that the fish present represent a fraction of historical abundance.
Relevant regulatory information is available from:
Getting There
Highway 1 (the Trans-Canada) provides direct access to the lower Thompson canyon. Spences Bridge is approximately 175 km northeast of Vancouver. The Coquihalla Highway (Highway 5) offers a faster route from the Lower Mainland to Merritt, connecting to Highway 8 which follows the Nicola River down to Spences Bridge. Several small campgrounds and lodges in the canyon accommodate visiting anglers, though accommodation is limited and advance planning is advisable during the October peak.