Poet's Beach is a thin crescent of imported sand on the west bank of the Willamette River in downtown Portland, sitting directly beneath the concrete piers of the Marquam Bridge that carry Interstate 5 across the water. It is reached from the South Waterfront Park Trail a few hundred feet south of RiverPlace Marina, and runs only about a hundred yards, pinched between stacked basalt riprap and the waterline. OpenStreetMap maps the sand as a strip only about fifteen feet deep at average river level.

The name comes from the approach. A stone-lined path drops through a notch cut in the basalt, and the stones along it carry thirty engraved excerpts of children's poetry about the Willamette, collected by the Honoring our Rivers project, interleaved with Chinuk Wawa words, phonetics and translations contributed by the Confederated Tribes of Grand Ronde. A sign at the top reads "Welcome to Poetry at the Beach." A kayak launch existed here from 2000 but had no signage and no real way down. The volunteer Human Access Project raised money and pulled permits starting in 2014, cut the rock, and added the art and signs, holding a staged opening that July.

The lifeguard question matters here because most write-ups get it wrong. Portland ran a 178,000 dollar pilot in 2017, its first pop-up beach, with lifeguards contracted through American Medical Response and loaner life jackets, and Mayor Ted Wheeler swam at the opening on July 13 that year. The pilot ended September 4, 2017 and was not repeated. The 2018 season, July 12 through August 26, ran without lifeguards, without picnic tables and without portable toilets. Portland Parks and Recreation now lists the site as a natural area, states plainly that there are no lifeguards on duty and that beach users swim at their own risk, and notes that no further improvements or maintenance are planned. Nothing is staffed and no season is posted. Access follows park hours of 5:00 a.m. to midnight.

There is no fee to use the beach. Parking is the cost. The beach falls in the city's Downtown parking district, where metered street parking runs 3 dollars 20 cents an hour from 8:00 a.m. to 7:00 p.m. Monday through Saturday and 1:00 p.m. to 7:00 p.m. on Sunday. Street spaces along SW River Parkway are few, garages nearby are plentiful, and most people arrive on foot or by bike along the esplanade. There are no facilities at the beach: no water, no tables, no toilets. The nearest permanent restrooms are at the South Waterfront Park Garden, a few minutes north. Dogs are allowed on leash.

Swimmable water is roughly July into September, when the river typically sits between 68 and 72 degrees. In May and June the air can hit the eighties while the river is still in the fifties, and temperatures drop fast again after August. The specific hazards are the bridge and the boat traffic. Marquam Bridge piers stand in the water just off the sand and throw current seams around themselves, and RiverPlace Marina and its ramp sit immediately upstream, so powerboats and jet skis pass close all summer. Outside the sand the bottom is cobble and broken basalt, so water shoes are worth wearing, and the bank drops off fast. Portland Parks rates river swimming here as needing intermediate to advanced ability, about a half mile nonstop.

Water quality improved sharply after the combined sewer overflow program finished in November 2011. Environmental Services runs Check the Rec from late May through September with results posted each Friday, though Poet's Beach is not itself a sampling point. The nearest weekly-tested site is the RiverPlace Marina boat dock at river mile 13.2, a short walk north. Oregon DEQ considers the Willamette here safe to swim most of the year, advises staying out after heavy rain, and says to avoid water that looks bright green or scummy.