The McKenzie River claims the watershed west down from Mount Washington, through Clear Lake, into the Willamette Valley. In December, the river is full and furious, trimmed with rime. The torrent grinds out agates from the mountain rock and sweeps them downstream. Ice edges the banks daring the water crashing over the black rocks. In my memory, it was December. I remember thinking how dark the water would be, how snow would line the banks, how cold the descent.