Serpentine outcrops are found in three main locations on the Tiburon peninsula—on Ring Mountain and Old St. Hilary’s, both Marin County preserves, and on the Middle Ridge, a Town of Tiburon open space parcel. Eva Buxton, who has led a habitat restoration effort partially funded by Marin CNPS for federally- and state-listed species on the Middle Ridge for several years, will lead a hike on this site to observe some of the rare species such as the Tiburon jewelflower and Marin dwarf flax, as well as other species that occur both on and off serpentine soils.

Meet at the top of Gilmartin Drive with the preserve on your left. From Hwy 101, take Tiburon Blvd. east for 2.9 miles to Gilmartin Drive. 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.

Leader: Eva Buxton,, 415.435.2745