The Making of Mt. San Jacinto

When the ground shakes the landscape moves up, down or sideways, or a combination of these. How did the granitic rocks of these mountains move up from perhaps 10 miles deep in the earth’s crusts to over 10,000 feet above sea level? What factors together did it and continue the uplift even as weathering and erosion tear them down. (see schedule for Part 2, The Destruction of the San Jacinto Mountains, September 8,) How much higher may San Jacinto peak be resulting from the inevitable “big one” on the southern San Andreas Fault? It could be none, to perhaps, 10 inches or more? I am betting it will be much more than “0”. There is recent precedence for such crustal uplift nearby. Are you ready for that one!? After the slideshow talk, we will check out some of the landforms in plain sight that tell us what has been happening over at least the last 5 million years when the earth shakes. It’s hardly an exaggeration to say it has changed everything. Find out how!

Date: Saturday, September 1
Time: 9:00 a.m. to about 12:00 p.m.  First trams departs at 8 a.m. Arrive early.       IT IS HIGHLY RECOMMENDED to buy a tram ticket in advance, online or at the ticket counter, for the 9 a.m. and earlier departures. Weekend tram service begins at 8 a.m. with departures thereafter usually every 12 minutes or so. Depart from the valley station at least one-half hour before class time. By doing so is assurance for arriving on time for the class. Online tickets are limited.  Order early!  Go to  If online tickets are not available many tickets are still available for walk-ins.   Note, if for any reason you are unable to use the ticket on the day reserved, tickets purchased in advance at the tram website, or on-site, are good anytime for 1 year from the date of purchase.  
Place: Tram mountain station, Nichols Room, two levels down from the tram exit to the ground floor on the left of the picnic patio.
Difficulty Level: easy to moderate
Distance:  about 2 miles round trip
Destination:  Grubb’s View and Long Valley
Preparation:  It will be about 30 degrees cooler than the desert floor, dress accordingly. Bring water and consider snacks

Any questions please contact us at

NHA members with membership card receive a 20% ticket discount on tram fare and 10% on food.

Booking: A reservation is required.  Only one booking is permitted at a time. For more than one, simply fill out the form again with the information for each additional enrollee and submit. Overbookings will be waitlisted and if space becomes available enrollee will be notified in order of priority.

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Bookings are closed for this event.

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