Interstate 5: route guide

I-5 is the west coast's north–south spine. It starts at the Mexican border in San Ysidro, 15 mi (24 km) south of downtown San Diego, and ends at the Canadian border at Peace Arch Park in Blaine, Washington. South of the border it becomes Mexican Federal Highway 1D toward Ensenada; north of Blaine, BC Highway 99 continues about 25 mi (40 km) to the Oak Street Bridge and on into Vancouver.

The road links San Diego, Los Angeles, Sacramento, Portland and Seattle, and passes the three state capitals — Sacramento, Salem and Olympia. It crosses I-8 and I-15 in San Diego, I-10 in Los Angeles, I-80 in Sacramento, I-84 in Portland and I-90 in Seattle, so you can join or leave the corridor almost anywhere.

Coordinates below are approximate city-centre points on the corridor, not exact freeway exits.

Distances below are freeway mileages between city pairs, not door-to-door, and the driving times are rough planning estimates (check) — city traffic can add an hour or more at peak. Break the route into these legs for a workable multi-day drive, or pick one leg for a shorter trip.

There is no single best season for the whole 1,381 mi (2,223 km) route — conditions change with latitude and elevation, so plan around the pass rather than the calendar. Check current road conditions before you commit to a crossing date.

Winter is the one season that can stop you. Siskiyou Pass, between Redding, California and Grants Pass, Oregon, sees snow and occasional closures. Check conditions before you cross the California–Oregon line; if the pass closes, wait it out around Shasta or Redding on the south side, or Ashland and Medford on the north side. A coastal detour via US 199 from Grants Pass to Crescent City is another option.

In summer, check wildfire and smoke conditions along the route as well as traffic; both can change plans at short notice.

The corridor is built for road trips, so lodging is dense and varied. City stays in San Diego, Los Angeles, Sacramento, Portland and Seattle suit walkable evenings; highway-side motels around Redding, Medford, Salem, Olympia and Bellingham suit a bed between driving days (check availability and rates for your dates).

Prices swing with demand and season, so compare live rates rather than relying on a fixed band. Camping and RV parks are common in Oregon and Washington; reserve ahead in summer (check).

If you are driving the whole route, aim to overnight before the pass and again before a big city, so you avoid arriving after dark.

This is a freeway trip, so the practical work is small but real. Carry a paper or offline map for rural stretches, keep a full tank before long gaps between towns, and check pass and wildfire conditions in summer and snow conditions in winter.

Vehicle: rental cars are the norm for visitors; one-way drop fees apply if you start and finish in different cities. If you drive your own car, check tire tread and brakes before mountain sections. Tolls are not charged on I-5 today, but tolls are planned for the Columbia River bridges between Oregon and Washington once they are upgraded, so check before you cross.

Documents: entry rules at the San Ysidro and Blaine border crossings depend on your nationality. Check official US and Canadian government guidance for your passport, visa or eTA requirements before you travel rather than assuming any document is accepted. Drive on the right, distances and speeds are in miles and mph, and fuel is sold in gallons.