The All Souls Procession — started by Tucson artist Susan Johnson in 1990 as a way to cope with the death of her father — has grown to include thousands of people. It’s organized by Many Mouths One Stomach, a nonprofit arts collective. The procession this year will begin on North Grande Avenue, south of West Speedway and west of the Santa Cruz River. The finale site is near the Mercado San Agustín.