Sandy River

About

Sandy River, Oregon — 1805 Lewis and Clark Quicksand, 1988 Wild and Scenic, Mt Hood, Bull Run. Long before explorers named it, the Sandy was Chinook territory. The river ran through the homeland of the Multnomah and Clackamas bands, and its salmon runs were a cornerstone of Chinook food culture along the Columbia. When William Clark reached the mouth on November 3, 1805, he found shifting sandy bars he could not cross and dubbed it the Quicksand River. The hydrology behind that name is volcanic: the Sandy is closely tied to Mt. Hood's geologic history, and at the time of Lewis and Clark it was still carrying large volumes of ash and sand from the mountain's last major eruption.

Throughout the 19th and early 20th centuries, the watershed was worked hard. From the 1830s through the 1920s, the Sandy River basin was logged to feed the regional timber industry and the railroad expansion that followed, with local sawmills, logging drives, and downstream lumber operations serving as the major operators. The old-growth stands were largely exhausted by 1910; the start of state forestry conservation in 1915 and the establishment of state forests in the 1930s brought the era of large-scale logging to a close. During this same period the Sandy first came under scientific scrutiny, beginning with USGS survey work in the 1870s.

Today the Sandy runs cool and fast off Mt. Hood, gauged at USGS streamgage 14142500 with an average flow near 1,400 cfs. Paddlers find its best water between 500 and 3,000 cfs, and the whitewater ranges Class I to III depending on the reach. The upper river from Zigzag to Brightwood is a Class II–III mountain run; the Sandy River Gorge, also Class II–III, is the most popular whitewater section; and the lower Sandy from Dodge Park down to Lewis and Clark State Park is an easier Class I–II family float.

The river's wild character earned it federal protection. On October 28, 1988, Congress designated the Sandy a National Wild and Scenic River, safeguarding 12.5 miles under law. Stewardship is split along the corridor: the U.S. Forest Service administers the initial 12.4-mile segment, while the Bureau of Land Management oversees the lower stretch between Dodge Park and Dabney Park. The designation also anchors the Sandy River Gorge, one of the river's defining landscapes.

The Sandy's modern chapter is one of restoration. Flowing through Mt. Hood National Forest, it supplies critical headwaters to the Bull Run Watershed, the source of Portland's primary municipal water supply. In 2007, the removal of Marmot Dam — one of the largest dam removals in U.S. history at the time — reopened 100 miles of habitat for salmon and steelhead and made the Sandy a national model for river restoration through dam removal. Near its mouth, the Sandy River Delta restoration stands as one of Oregon's largest riparian restoration projects. From a quicksand barrier that once stopped explorers to a protected artery feeding a major city, the Sandy remains one of Oregon's defining waterways.