 Heading north on the South Kaibab Trail leads to the black suspension bridge and across the river to the North Kaibab Trail junction.Grand Canyon National Park categorizes the River Trail as a "corridor trail", and receives regular maintenance and patrols by park rangers.On 31 July and 1 August 2006, passing thunderstorms eroded long sections of the River Trail at an area called the sand dunes, exposing power and water lines that run along and under the trail's road bed.