Juncus effusus var. pacificus (Pacific rush) at the bottom of a sag pond just below the trail. At least that's my best guess on the species. Douglas firs on the far hillside, then a layer of cucumber vines (Marah). Blackberries on the near side.
2015CA CoastCA Far NorthJuncaceaeJuncusPF
From Sinkyone State Park - May 2015