Every September, about 35,000 small birds pour into a brick school chimney in Northwest Portland like water down a drain. The Vaux’s swift migration has been stopping at Chapman Elementary School since the 1980s, and it remains one of the stranger, more genuinely moving things you can witness in this city — and it costs nothing to attend.
The swifts arrive from as far north as Alaska and British Columbia, funneling south toward Mexico and Central America. Chapman’s chimney, decommissioned since the 1980s and kept unlined specifically for the birds, is one of the largest known roost sites for the species on the entire continent. That detail still catches people off guard when they hear it. A decommissioned school chimney in a residential neighborhood, and it’s a continental landmark.
Getting there is straightforward. Chapman sits on NW Pettygrove at 26th Avenue, right at the edge of the Alphabet District where it tips toward the hills. Most people arrive around 7 p.m. on a clear September evening and claim a patch of the school’s front lawn. You’ll want a blanket or a stadium cushion — the grass slopes, and you’ll be sitting for a while. Locals bring wine, cheese, and whatever’s in the fridge. Food carts occasionally park nearby during peak season, but don’t count on them; bring your own.
The birds show up in small groups at first, wheeling overhead in loose circles. Over about 45 minutes, those circles tighten and multiply. The sound builds — a high, chittering rush — and then the spiral suddenly collapses inward and the birds start to drop into the chimney in a fast, continuous stream. People gasp. It happens every time, even for people who’ve been coming for years.
Peak migration usually lands in mid-September, though the timing shifts slightly year to year. On the best nights, the lawn is packed with several hundred people — families, couples, birders with binoculars and the serious look of people who’ve driven from out of state. The Audubon Society of Portland sends volunteers most evenings during the season; they set up spotting scopes and answer questions patiently. If you have kids, talking to one of the volunteers first is worth the few minutes.
One thing worth knowing: the swifts’ evening is occasionally interrupted by a Cooper’s hawk. The hawk will dive into the flock looking for a meal, and the whole mass of birds will explode outward before gradually pulling back together. The crowd reacts the way a crowd at a live game does — groans, then relief, then applause for nothing in particular. It’s a little absurd and entirely communal.
The spectacle runs roughly from late August through early October, peaking around the second and third weeks of September. Weekends draw the biggest crowds; a Tuesday night in mid-September might give you room to breathe without sacrificing the show. Sunset is when it all happens, so check the time and show up 30 to 45 minutes before to get settled.
There’s no ticketing, no reservation, no entrance fee. The whole thing just happens, and the city mostly shows up for it. That’s the detail that feels most worth repeating.
