MileCheckBritish Columbia is the hardest driving in Canada to do without knowing where you are. The province is one long argument between highways and mountains — canyon roads, high summits, coastal cliff runs — and when something goes wrong out there, “somewhere past Hope” is not a location. BC counts its highways in kilometres like the rest of Canada, but it references them in its own way: landmark to landmark. Here’s how the system works, what the Coquihalla will teach you about it, and how it’s coming to MileCheck.
Landmark to landmark: how BC references its roads
BC’s transportation ministry keeps a reference system called the Landmark Kilometre Inventory — each highway is broken into segments that run from one named landmark to the next (a junction, a bridge, a town boundary, a summit), with kilometre distances measured along each segment. It’s the bookkeeping behind how the province locates things on its own roads, and you can hear it in the way BC talks about its highways: a DriveBC closure isn’t “at km 214” of some abstract count, it’s “on Highway 1 between Boston Bar and Lytton,” or “on Highway 5 north of the Great Bear Snowshed.” Highway, then landmarks, then distance — that’s the BC dialect of the mile-marker language. Drivers don’t need to know the inventory exists; they just need to report locations the same way the province does: the highway, your direction, and where you are between two places everyone can find on a map.
Highway 1: the Trans-Canada, canyon and all
Highway 1 enters from Vancouver Island by ferry, crosses the Lower Mainland as the region’s main freeway, and then does something American interstates rarely do: it squeezes into the Fraser Canyon, trading lanes for tunnels and trestles as it follows the river north through Yale, Boston Bar, and Lytton before swinging east to Kamloops, Revelstoke, and the Rogers Pass run to the Alberta border. Through the Lower Mainland it behaves like a modern freeway — and its exit numbers follow the kilometre count, so the gap between two exits tells you the distance between them. Out in the canyon and the mountains, the freeway conventions fall away and the landmark system takes over completely.
Highway 5: the Coquihalla
If you learn one BC highway, learn this one. The Coquihalla — Highway 5 from Hope up over the mountains to Merritt and Kamloops — is the main inland route between Vancouver and the rest of Canada, a wide modern freeway that happens to climb to a summit around 1,240 metres. In summer it’s a fast, beautiful three-hour hop. In winter it’s the highway BC drivers check before they check the weather at home: heavy snow arrives early and stays late, the summit sections get storms the valley never sees, and closures for snow, avalanche control, and multi-vehicle crashes are a routine part of the season. In late 2021 an atmospheric-river flood tore out sections of the highway entirely and closed it for weeks — a reminder that this corridor is infrastructure under siege. Checking DriveBC before driving the Coquihalla in winter isn’t caution, it’s procedure.
Chains, winter tires, and the October 1 rule
BC backs its mountain highways with law. On designated winter routes — signed at the start of each corridor — passenger vehicles must run winter tires or mountain/snowflake-rated rubber, and commercial vehicles must carry chains and chain up when the signs say so. The requirements run from October 1 each year, and on the high mountain corridors like the Coquihalla they extend through April 30 — the province is telling you the summit’s winter is seven months long, whatever the calendar in Vancouver says. Chain-up areas are signed pullouts before the climbs; commercial drivers who skip them in a chain-up condition can be fined and turned around. If you’re used to US chain law from Washington or the Sierra, the system will feel familiar — the dates are just wider.
Highway 97 and the Sea-to-Sky
Two more corridors round out the essentials. Highway 97 is the longest numbered highway in the province — it enters at the US border near Osoyoos, runs the length of the Okanagan through Penticton and Kelowna, and just keeps going: north through the Cariboo to Prince George and onward toward the province’s far northeast. For hundreds of kilometres it is simply the road, and between towns the highway-plus-distance habit is the only location language available. And Highway 99, the Sea-to-Sky, is the Vancouver–Squamish–Whistler run: a cliff-hugging drive along Howe Sound that was rebuilt for the 2010 Olympics and remains one of the most scenic — and most weather-exposed — commutes in the country.
DriveBC: the road report BC actually uses
BC’s road-condition service is DriveBC — the province’s live map of closures, incidents, construction, and webcams, run by the transportation ministry. It’s the reflex check before any mountain drive, and its reports speak the landmark dialect: highway, direction, and the stretch between two named places. The webcams matter more here than almost anywhere — a camera at the Coquihalla Summit answers the only question that counts in January, which is what does the road actually look like up there right now.
When you’re the one calling in — a breakdown north of Hope, a crash on the canyon — give it the same way: the highway, your direction, and your position between two landmarks, with a kilometre distance if you know it. “Highway 5 northbound, about 20 km north of Hope” is a location a dispatcher can act on. On roads where the towns are an hour apart, that sentence is the difference between help driving to you and help driving past you.
What this means in MileCheck
MileCheck’s job is to tell you exactly where you are, in the reference system your road actually uses. In the US that’s the mile marker. In BC it’s the kilometre, anchored to the highways and landmarks the province already reports against — and British Columbia support is coming to MileCheck in an upcoming update. When it lands, the app will show your live position as highway plus kilometre — Hwy 5 · KM 115-style — so the next time you’re on the Coquihalla in a whiteout, the answer to “where are you?” is already on your screen.
Keep reading
Next door: Kilometre markers in Alberta · Northwest Territories · Nova Scotia · Washington · Idaho · Alaska
Essentials: What to tell 911 on the highway · How to find your mile marker · All provinces & territories