Part 2 of the geologic story of the San Jacinto Mountains. Join Park Interpreter Ali Barnes to investigate how these strikingly vertical peaks are being torn down by earth’s erosional forces, even as they continue to rise into the sky. Just as the volcanos that preceded them 100 million years ago are now gone, the uplift will end sometime in the distant future and time and gravity will, together, inexorably prevail and these mountains too will slowly disappear from the landscape forever.  She will begin with an hour-long lecture and then proceed with a 1.5-mile walk around Long Valley to apply that newly gained knowledge to our immediate surroundings.

Date: September 8, 2018
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 on the ground floor to the left of the patio at the top of the ramp to the valley.
Difficulty Level: easy to moderate
Distance:1.5 miles round trip
Destination: 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, reset the form by deleting previous data or clicking Back to Schedule Page.  The name of each additional registrant is required even if using the same email address. Overbookings will be waitlisted and if space becomes available registrant will be notified in order of priority.

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Bookings are closed for this event.

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