Chocolate Bridge, Siskiyou County, California
Photo by Jay Wilbur
NABSQNO 10T-623625-4618545. Chocolate Bridge is a lava natural arch that resulted from the partial collapse of the basalt roof of the Hopkins Cave lava tube formed by the Mammoth Crater flow, which occurred about 35,000 years ago. It is located about a half mile south of the Visitor Center within the Lava Beds National Monument, in Siskiyou County, California. Access is via the Garden Bridges Trail from the Cave Loop Road. It has a span of about 12 feet.