A vehicular trailering system includes a plurality of cameras disposed at a vehicle, and a control having an image processor that processes image data captured by the plurality of cameras. With a trailer hitched to the vehicle, the system determines trailer angle of the trailer relative to the vehicle responsive at least in part to processing of image data captured by at least some of the cameras during forward motion of the vehicle. With the cameras disposed at the vehicle and with the trailer hitched to the vehicle and responsive at least in part to processing of image data captured by at least some of the cameras during forward motion of the vehicle, an object exterior of the vehicle is detected. Responsive to detection of the detected object, the system plans a path of forward travel of the vehicle towing the trailer that avoids contact with the detected object.