There are frequent buses on the Panamerican highway, & colectivos, often old American cars for 6 people between Chimbote & Casma. There are day buses from Casma via the Callán Pass & Pariacoto to Huaraz, & mainly night buses via Pativilca to Huaraz. Further south, Barranca & Supe may offer transport to Caral (http://www.caralperu.gob.pe).