Serpentine outcrops are found in three main locations on the Tiburon peninsula.
Meet on Gilmartin Drive with the Preserve on your left. From Hwy 101, take Tiburon Blvd. East, for 2.9 miles to Gilmartin Dr. Make a left and drive uphill for 0.5 mile and park along the curb. Dress in layers; bring sunhat and sunscreen, lunch, and water. Heavy rain cancels.