River or Slough? The Sammamish Can't Decide, and Neither Can We
Quick quiz for my fellow Eastsiders: what do you call the flat, slow-moving waterway between Lake Sammamish and Lake Washington that you bike, run, or kayak along every summer? If you said "river," you're only sort of right. If you said "slough," you're also only sort of right. The U.S. Geological Service (USGS) calls it the Sammamish River. The river supplies 27% of Lake Washington’s water. Longtime locals still call it the Sammamish Slough. Old maps call it the Squak Slough. Nobody, apparently, felt like settling this before naming an annual hydroplane race after it. Image by Galeeb Kachra So which is it? Technically, a slough is a slow, marshy, meandering channel — which is exactly what this waterway was for most of its existence. It wound through a wide, swampy valley for 30 miles. What you see today, a tidy, 10-to-14-mile, laser-straight ditch with a bike trail on top, is a river only in the sense that a canal is a river. Both run where engineers told t...