Ring Mountain, Tiburon, 3 miles or 6 miles

Ring Mountain is Trip 4 in the Geologic Trips: San Francisco Bay Area. The trip is subtitled "Exotic Blocks -- Thermometers in the Subduction Zone."

As usual, the first 15 minutes will be a short background talk on the overall geology of the area. We'll start hiking about 15 minutes after the scheduled start time.

We'll start at the Parking lot on Paradise Drive on the far north side of the mountain (see the Google map), then hike up to the two stops on from the Geologic Trips book (Taylor Road and Ring Mountain summit). Ring Mountain is 602', and we're starting at the bay, so we're climbing 600'. After these two stops, we'll hike back past Turtle Rock, and those who want a three mile hike can return down Phyllis Ellman Trail to the parking lot. The rest of us will hike along the Ring Mountain Fire Road, then loop back through the Tiburon neighborhoods (see Google map).

Download a PDF trail map of Ring Mountain and Tiburon Ridge Open Space Reserves (PDF).

• A complete Google map can be found here.

• Bay Nature article on Ring Mountain Geology.

• Prof. Jim Locke's Ring Mountain Geology page.

• Rock carvings on Ring Mountain.

• Northern Cal Geologic Society page on Ring Mountain (great photos)

• Great photomicrographs of thin sections taken by Howard Day and Warren Gray.

• KMZ map showing geologic map (thanks, Brenor). You can read this using Google Earth or other KMZ capable programs.

Our past three trips to Ring Mountain (with photos and reviews): Sept 2012, Oct 2010, and Feb 2010.

On our non-rainy trip, we got to the top at about noon, a bit slower pace than usual but everyone was having a good time. Not sure what our pace will be this year, but no one is left behind (although occasionally individuals realize they need to turn back due to time or fitness).

Kids are welcome, and the shorter version of this hike may be ideal for them. Due to too many bad experiences, dogs are not allowed on my hikes.

Note: The Ring Mountain map listing on Meetup is just a bit west of our meeting place--use the Google map link above to get the correct location.

Don't worry if the sign up number gets large; our hikes tend to end up with 15-25 people (given the number of no-shows). Gather at 10:45, we'll leave at 11:00 promptly. I'll email my cell number to the YES RSVP list the day before the hike. Cell coverage SHOULD be good, in case you get there late and want to try to catch up with us.

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  • Ann

    Thanks, everyone. Have a happy holidays:)

    December 22, 2013

  • Debra G.

    Thanks Lee! This was great! Happy holidays to everyone.

    December 22, 2013

  • Lee T.

    "Notes for next time:"

    Change wording in description from "parking lot" to "Parking area" or something more correct--there is not "lot."

    Total distance on GPS was 5.5 miles; we left at 11:00 and got back four hours later. Reach turn off for 3 mile hike after two hours (including lunch break at summit). It felt like we spent less time looking at rocks this time.

    December 22, 2013

  • Veronique S.

    Fantastic! Perfectly well balanced as usual with Lee!

    December 22, 2013

  • Philippe

    Great hike with beautiful views and in excellent company! Thank you Lee. Happy Holidays to everybody.

    December 22, 2013

  • Kevin M.

    Great weather, wonderful views, and excellent company.

    1 · December 22, 2013

  • RZ

    Thanks Lee.

    1 · December 22, 2013

  • Daniel J.

    A splendid hike with panoramic views of the Tiburon peninsula, Angel Island, the Golden Gate and Mount Tam. It seemed our large group had this under-appreciated nature preserve to ourselves, as we saw very few other hikers despite the clear sunny weather. I would have liked more geology, but I missed Lee's orientation talk by arriving late.

    December 22, 2013

  • hihike

    Hello; my name is saili, this is my first trip with this group. Wonder if I can get a ride?I can go to any Bart station to meet you.Appreciate a lot

    December 21, 2013

    • Katie

      Saili , I hope you get back okay. Call me if you need a ride back to BART. [masked]

      December 22, 2013

    • hihike

      Gina offered me a ride to Oakland. Thank you so much for everything. Merry Christmas and a happy New Year!

      December 22, 2013

  • Paula A.

    We are at 5300 paradise dr and can't find anyone! :(

    December 22, 2013

    • Katie

      It's not right there, can you pull up the Google map?

      December 22, 2013

    • Katie

      We are parked along the road at the Phyllis Ellman trailhead. Large group of people.

      December 22, 2013

  • sylvia

    Anyone coming from southbay/eastbay I can get a ride from? or I can meet at any BART station. Thanks

    December 17, 2013

    • Lee T.

      Sylvia, we can pick you up from Balboa BART at 9:45, but you need to be on time because I can't be late :-) My cell is[masked]

      December 21, 2013

  • Rebecca

    Is there anyone coming through the east bay who could pick me up in Richmond? I could meet you at this shopping center right next to a 580 offramp: https://maps.google.com/maps?q=37.92019,-122.347829&num=1&t=m&z=17 Will chip in for gas, of course. Thanks!

    December 17, 2013

    • Daniel J.

      Hi Rebecca, I'm coming from Pleasant Hill and could pick you up around 10:15, if you still need a ride. --Daniel

      December 21, 2013

    • Rebecca

      Thank you, Daniel! A pile of stuff has come up, and i don't think I'm going to make it after all. :-(

      December 21, 2013

  • Lana

    I also need a ride from the Rockridge area or an Oakland BART station.

    December 12, 2013

    • Daniel J.

      Hi Lana, I'm coming from Pleasant Hill and could pick you up in Oakland around 10:00, if you still need a ride. I plan to stay for the 6-mile hike. --Daniel Jacobs

      December 21, 2013

  • hihike

    Hello;

    December 21, 2013

  • A former member
    A former member

    Sorry I can't make it- looks like a wonderful time will be had by all...

    December 20, 2013

  • Ann

    Ok to bring a 3.5-month old puppy?

    December 20, 2013

    • Ann

      Thanks, Vikram. I didn't see that note. I'll leave the puppy at home.

      1 · December 20, 2013

  • RZ

    Guys, me as usual looking for a ride from SF. If anyone is driving, have a spot and willing to give one, please let me know, post or send an email. I am at 12th St. and Folsom, SOMA. Thanks, Rafael.

    December 16, 2013

    • Paula A.

      Sure! I will be driving a dark gray subaru Tribeca

      December 16, 2013

    • RZ

      I will be there. Thanks

      1 · December 17, 2013

  • joan O

    Can anyone offer me a ride from San Fran?

    December 11, 2013

    • Paula A.

      Hi Joan, I suggest we meet at 10:00 AM on Noe at Duboce, right by the Muni N stop at Duboce Park (you can also take Muni to the Church Station and walk a couple of blocks to the park). I will be driving a dark gray Subaru Tribeca with a kayak holder on top. I will email you my phone number, just in case.

      December 16, 2013

    • joan O

      Noe and Duboce is the perfect place for me to meet. I just sent you my phone # in your personal box. I'll see you there at 10:00

      1 · December 16, 2013

  • Paula A.

    Will we see eclogite outcrops?

    December 15, 2013

  • Lorri G.

    Don't forget your hand lens/jewelers loop. You'll want one here.

    2 · December 12, 2013

    • Lee T.

      Good suggestion. I'm also wondering if anyone has experience with using a phone's camera to zoom in, take photos, then zoom in some more. I just tried it out with my camera at 4x zoom, and it worked "OK." Not as clear as a handlens, but more stable and long lasting :-)

      December 13, 2013

  • Eve R.

    Sorry to miss this hike I will be out of town.

    December 11, 2013

  • Laurie

    December 11, 2013

    • Lee T.

      Thanks, Laurie, I fixed the link :-)

      December 11, 2013

  • Sal

    Sounds good..will be a good send-off before my car trip to AZ with stops at San Andeas Fault sites. Looking forward to meeting people

    December 11, 2013

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