12 reviews and 85 photos of Dumbarton Quarry Campground "An accessible, dog-friendly campground off of Dumbarton Bridge that is perfect for day trips or stopovers. There's a fire pit/BBQ grill at each campsite, as well as a picnic bench. Amenities include showers, kids' playground, reservable picnic areas, hiking trails, bike trails, amphitheater, and a pond.