Merced River

About

Merced River and the 1864 Yosemite Grant. For paddlers, the Merced reads as three distinct rivers strung along one descent. In Yosemite Valley the water runs Class I–II past El Capitan and Half Dome, an unhurried float beneath the granite. Downstream from El Portal to Briceburg it steepens into a Class III–IV transition canyon. Below that, Briceburg to Bagby holds the Merced Gorge, a Class IV–V run rated expert only. The USGS streamgage 11264500 anchors the numbers behind those ratings, with an average flow near 1,185 cubic feet per second and an optimal paddling window between 600 and 3,000 CFS.

Long before any gauge or grant, the Merced flowed through the heart of Ahwahneechee territory — the Southern Sierra Miwok, for whom Yosemite Valley was 'Ahwahnee,' 'place of the gaping mouth.' The river was central to their subsistence and cultural life for thousands of years. In 1851 the Mariposa Battalion forced them from the valley, a rupture that preceded the wave of federal protection to come.

The watershed's industrial chapter ran from the 1830s through the 1920s. Sawmills, logging drives, and downstream lumber operations fed the regional timber industry of the 1850s–1910s and the railroad expansion of the 1860s–1910s. Large-scale logging ended as the old-growth stands were exhausted around 1910, state forestry conservation began in 1915, and state forests were established in the 1930s.

Protection came early and in stages. The 1864 Yosemite Grant, signed by Abraham Lincoln on June 30, 1864, was the first federal land grant for a scenic natural area, preceding the National Park Service by 52 years. The Merced itself runs 145 miles from the Sierra Nevada to the San Joaquin. When Congress designated the river Wild and Scenic in 1987, it acted specifically to protect the Merced Gorge from dam proposals that had circulated since the 1940s, cementing the corridor as one of California's most protected.

The modern era has turned toward repair. In 2014 the National Park Service's Yosemite Valley Plan began restoring the Merced's natural floodplain within the valley, removing developed facilities from the flood zone and letting the river meander more freely — the first major floodplain restoration in a national park at that scale. The following year, the 2015 restoration of the lower Merced channel along Yosemite's 8-mile El Portal stretch became the largest river-restoration project in NPS history. Guided trips through the gorge run today with outfitters such as Zephyr Whitewater Expeditions and ARTA River Trips.