The Sanel Valley in Mendocino County, California, is a valley along the Russian River containing the town of Hopland. The river flows through the valley for approximately 6 mi from the northeast (where it connects from its headwaters and the Ukiah Valley through a rocky constriction) to the southwest, and it is met near Hopland by two tributaries, Feliz Creek on the west side of the river and McDowell Creek on the east. The valley is approximately 2 mi wide, and covers an area of 8.4 mi2.