Like any highway, the River Road (Highway 160) was designed by engineers. But its path was not dictated by geometry and physics so much as geography and hydrology. In the Sacramento-San Joaquin River Delta, everything is dictated by the rivers. The landscape, the transportation, the recreation, the cuisine and the culture. The region includes some of the state’s most important wetlands, some of its quirkiest history and some of its most colorful places to eat. Here’s our guide to some of the promising pit stops on a delta road trip.