Quarry Plaza, UCSC, Santa Cruz. Intersection of Hagar and Steinhart. Directions: Come up to the entrance of campus and proceed straight. At the SECOND stop light on campus, make a left onto Hagar. Keep going up, up, up the hill until you reach the intersection of Hagar and Steinhart. Make a left and the Quarry Plaza is on your right. IF there is no parking in the Plaza's small lot, there is an immediate left which will take you to Hahn Parking (next to Hahn Student Services).