Magnolia Trail

Come in early March and the show has already started, one tree at a time. A single star magnolia opens weeks ahead of its neighbors; by April whole crowns go pink and saucer-sized; and in June the last of the collection is still unfurling flowers while the earliest trees have long since let theirs fall. This is a garden built to bloom in slow motion — and this short, steep footpath is how you walk up through the waves.

For a naturalist in spring, or a first-timer who wants Portland’s flowering trees at their best, it’s an easy hour well spent among labeled specimens on the arboretum’s south slope. Be warned about the other nine months, though: with the flowers gone, the Magnolia Trail is a stiff little climb up soil switchbacks through a maze of near-identical parallel paths, and it’s honest to call it that. The distinction it carries is a seasonal one.

And it is a real distinction. Hoyt’s magnolias are a nationally recognized collection — one of only a handful of magnolia holdings in the country singled out that way. More than 140 trees grow here, spanning 42 species and 34 cultivars, and they weren’t planted at random. They were arranged to flower in succession, so that a visitor coming any week from March through June finds something in bloom rather than betting a whole year on a single peak weekend.

The Walk

Most people meet this trail from below, where the Beech Trail comes in; keep left there and the path tips uphill. It climbs the full slope — roughly 155 feet — in three switchbacks over barely a third of a mile, which is the whole trick of it: short on the map, and steeper than short trails usually are. It’s natural soil the entire way, soft and shaded, and it holds water after rain, so expect slick footing in the wet months.

The lower reaches are where the magnolias cluster, one labeled species giving way to the next as you rise. This is the payoff, and it’s worth slowing for. Then, up on the higher switchbacks, the collection thins and a different set of trees takes over — sassafras and sweetgum, which do their own quieter work later in the year. The sweetgum in particular is one of the arboretum’s better fall-color trees, so the same climb that’s a flower show in April becomes a small burn of color in October.

Forest Skill — why a garden blooms in waves A single magnolia flowers for a week or two and then it’s done. Plant one species and you buy yourself one good weekend a year. But magnolias are an enormous, ancient genus, and their species and cultivars bloom on different schedules — some in the first warm days of March, some holding off until June. Gather enough of them on one slope and you’ve built a relay: as one tree drops its petals, the next is opening. That’s the difference between a collection and a planting. The bloom you catch on any given visit is really a slice of a three-month-long chain.

Kid Quest In spring, the goal is one of each color — find a white magnolia, a pink one, and one that’s somewhere between (the saucer magnolias fade through both). Bonus: spot a flower that opened before the tree grew any leaves at all, which is how most magnolias do it. Then count the switchbacks on the way up. There are three, and your legs will agree.

The one genuine hazard here isn’t the grade — it’s getting turned around. This corner of the arboretum is a dense knot of parallel trails that all look alike under the trees, and the Magnolia Trail weaves through the middle of it. Even short walks go sideways here. Carry the map.

Before you go

The season is the whole point. March through June is the marquee, with the bloom moving up and down the collection the entire time; if you can only come once, aim for April, when the most trees are out at once. Come in fall and the sweetgums up top are the reason. Come in, say, August, and you’ll get a hot, steep, confusing little climb and wonder what the fuss was about — so time it, or wait.

Foot traffic only: bikes aren’t permitted on the arboretum’s trails, and dogs are welcome on leash. Wet-season mud is the standard Portland tax, and the soil switchbacks hold it; stay on the tread through the soft patches rather than skirting them, which only widens the trail into the slope.

Find a magnolia in full flower and stand under it for a minute before you climb on. These are among the oldest flowering plants on Earth — they were blooming before there were bees to pollinate them, back when beetles did the job. You are looking at a very old idea, doing it again this spring.