Cassiar Highway

Cassiar Highway
Name	Cassiar Highway
Route number	BC 37
Length km	730
Established	1975
Terminus a	Kitwanga
Terminus b	Jasper
Provinces	British Columbia, Alberta
Maintained by	British Columbia Ministry of Transportation and Infrastructure, Alberta Transportation

Cassiar Highway is a provincially numbered route in western Canada that links northwestern British Columbia with the Alberta border and connects to Alberta Highway 16 near Jasper. The corridor traverses remote sections of Skeena River, Stikine Country, and the Cassiar Mountains, serving resource towns such as Dease Lake, Stewart, and Iskut. The highway functions as a strategic north–south artery for access to the Alaska Highway, Yellowhead Highway, and coastal ports, while crossing traditional territories of numerous First Nations including the Tahltan Nation and Kitselas First Nation.

Route description

The route begins near Kitwanga at an interchange with Yellowhead Highway/BC Highway 16 and proceeds northwest through the Skeena valley, paralleling the Skeena River and passing Hazelton and New Hazelton. It climbs into the Bulkley Valley toward Dease Lake via the Cassiar Mountains and follows corridors adjacent to waterways such as the Stuart River and Dease Lake. Northbound, the highway provides the principal overland link to Tahltan, Telegraph Creek, and the Stikine watershed before swinging east to join the Alberta–British Columbia border and the Yellowhead Pass. Along its length the route intersects provincial roads to Stewart and Hyder and connects to logging roads and mineral access roads that serve mining centres such as Eskay Creek mine and exploration areas in the Golden Triangle.

History

Construction and designation of the corridor trace to post‑World War II development and northern resource expansion during the 1950s–1970s, when provincial efforts extended road access to logging, mining, and fishing communities. Early trails and pack routes used by Indigenous nations and fur traders were improved with bridges and gravel surfaces under programs associated with British Columbia Transportation Development initiatives and federal‑provincial cooperation during the tenure of premiers such as W.A.C. Bennett and Dave Barrett. The numbered provincial designation was formalized in the 1970s as northern infrastructure priorities shifted to serve the expanding mineral exploration boom and to provide an alternative to the Alaska Highway route. Major historical events influencing alignment included the discovery of base and precious metal deposits at Eskay Creek and the transportation demands of the World War II and Cold War eras for northern access routes.

Major intersections and termini

The southern terminus is at an interchange with BC Highway 16 near Kitwanga and Hazelton. Key junctions include connections to roads serving New Hazelton, spur routes to Stewart and Hyder via BC Highway 37A, and access roads to Dease Lake and Tulsequah areas. The northern extent meets Alberta Highway 16 in the vicinity of Jasper National Park and Yellowhead Pass, providing linkage to Edmonton, Prince George, and the coastal ports at Prince Rupert. Other notable intersections provide access to provincial parks such as Spatsizi Plateau Wilderness Provincial Park and to communities including Iskut and Snip Mine access roads.

Traffic and usage

Traffic volumes on the highway vary widely: sections near Prince George and Kitwanga experience moderate commercial and passenger flows, while the northern stretches through Stikine Country are low‑volume with seasonal spikes tied to tourism, fishing, and mining operations. Freight traffic includes logging trucks, ore haulage linked to operations like Eskay Creek, and supply runs for remote communities including Dease Lake. Recreational traffic increases in summer months as visitors access Mount Edziza Provincial Park, Twin Falls, and cross‑border visitors heading to Alaska and Yukon. Winter conditions reduce mobility and increase reliance on maintenance windows managed by provincial crews from British Columbia Ministry of Transportation and Infrastructure and Alberta Transportation.

Environment and geography

The corridor crosses diverse ecoregions from the coastal‑influenced Skeena valley through montane forests and alpine tundra in the Cassiar Mountains and over watersheds including the Stikine River and tributaries feeding the Pacific Ocean basin. Habitats along the route include old‑growth sitka spruce stands near coastal sections, subalpine meadows, and boreal transitional zones that support wildlife such as grizzly bear, black bear, moose, caribou, and migratory birds including sandhill crane and trumpeter swan. Environmental challenges have included impacts on salmon runs in the Skeena River system, wetlands disturbance, and permafrost‑related ground instability exacerbated by climate change and increased industrial traffic.

Maintenance and upgrades

Maintenance is split between provincial agencies; major upgrades have included paving projects, bridge replacements, and realignments to improve grade and winter safety. Notable projects addressed washout repairs after flood events linked to extreme weather, culvert replacements to restore fish passage in accordance with regulations like the Fisheries Act provisions administered by Fisheries and Oceans Canada, and widening at key passing lanes to accommodate freight. Planned and completed improvements have been funded through provincial capital programs and federal infrastructure funding streams under ministers such as John Horgan and Rachna Singh administration initiatives, with consultations involving Tahltan Nation and other Indigenous governments to mitigate cultural and ecological impacts.

Category:Roads in British Columbia Category:Roads in Alberta