Some of the most impressive old-growth forest in North America isn't in California. It's a five-minute walk from a parking lot on Vancouver Island. MacMillan Provincial Park, better known as Cathedral Grove, protects a stand of coastal Douglas firs that have been growing for more than 800 years — trees that top 250 feet, with the widest trunk measuring almost 30 feet around. One fir is so wide a small family couldn't form a ring around it with linked arms.

The park sits on central Vancouver Island, right off Highway 4, roughly 2.5 hours from Victoria. CBC News readers once voted it British Columbia's best roadside attraction, and it's easy to see why: you can step out of the car and into a temperate rainforest where moss-draped giants tower over ferns and soft forest floor. Most of the trails are flat and gravel-based, so it works for strollers and multi-generational groups. Budget at least 45 minutes, longer if you're a photo person — and you probably will be.

The highway splits the grove in two, and each side has its own character. The south side is the classic Douglas fir experience. The north side is quieter, with a wooden boardwalk winding through western red cedars and along the shore of Cameron Lake. One practical warning visitors repeat: crossing the road between the two sides means dealing with fast-moving highway traffic, so take care.

There's a conservation angle here too. According to the Ancient Forest Alliance, only about 0.3% of British Columbia's forests still contain trees this old and this big — the rest were logged over the past century and a half. Cathedral Grove is a rare surviving fragment, and it supports owls, woodpeckers, deer and other wildlife, though sightings are never guaranteed.

Timing matters more than you might think. This is a temperate rainforest, with up to 200 inches of rain a year and mild temperatures. Winter brings mist, mud and possible snow on Highway 4, so waterproof shoes are essential. Summer is drier and popular, which means crowds — arrive early in the morning if you want a parking spot. Locals often point to spring and fall as the sweet spot: the forest stays lush, the crowds thin out, wildflowers bloom between March and May, and fall colour appears from September to November.

The park also makes a natural stop on a wider island road trip. Port Alberni — billed as Canada's "ultimate fishing town" — is just down Highway 4, and the Parksville Qualicum Beach area makes an easy coastal detour. Keen tree hunters can push on to Pacific Rim National Park Reserve to see the Cheewhat Giant, Canada's largest tree.

For anyone who wants the scale of California's redwoods without the long drives and permit planning, Cathedral Grove is about as low-effort as world-class forest gets: park, cross the road, and stand under trees older than most countries.