The Los Angeles and San Gabriel rivers have long been afterthoughts in the Southern California landscape — natural beauties scarred by neglect, industrialization and pollution — but a group of Cal Poly Pomona students has crafted an ambitious plan to help revitalize the watersheds and their ecosystems. The Golden Necklace, a capstone project for more than three dozen graduate and undergraduate students in the Department of Urban and Regional Planning, envisions a regional trail system along the rivers that is inviting, environmentally sound, and accessible to traditionally underserved communities in Southern California.