Tuolumne Meadows Geology

Tuolumne Meadows Geology

On this guided weekend adventure, explore famous features in the Tuolumne Meadows area with a National Park Service geologist.
August 23, 2019 to August 25, 2019

Yosemite’s remarkable rock formations are among the park’s most recognizable features. On this guided weekend adventure, explore some of those famous features in the Tuolumne Meadows area with a park geology expert. During two day hikes, you’ll get the inside (and ancient) story of Yosemite’s peaks, domes and cliffs. Learn how glaciation has shaped the Sierra landscape, from the jagged nunataks that jutted out above the ice to the erratic boulders left behind when the glaciers melted. Bring your scientific curiosity and rock-related questions!

Included with your registration:

  • Introductory evening meeting at Parsons Memorial Lodge on August 23, starting at 6 pm. In addition, two day hikes in Tuolumne Meadows (Saturday, August 24, at 8 am, through Sunday, August 25, until about 3 pm).
  • Park entry (as needed).
  • Camping included, if needed; limited sites are shared among all the participants (arriving August 23 and departing August 26) at Tuolumne Campground.

Note: There is no discount if you choose not to use our gate pass or campsites. Information about upgrading your accommodations to stay at Tuolumne Lodge will be emailed to you after you sign up. The option to upgrade expires 45 days before the start of the program.

Experience Level: Any. Participants must be physically fit and comfortable hiking at high elevations.
Hiking: Moderate. 6–7 miles per day.
Elevation Range: 8,600 feet–10,000 feet.
Registration fee: $169
View a suggested day hike packing list.
Greg Stock, Yosemite Conservancy expert guide

Greg Stock

Greg Stock is Yosemite’s first park geologist. He has a Ph.D. in Earth Sciences from the University of California, Santa Cruz where his research focused on dating the uplift rate of the Sierra Nevada. Since arriving in Yosemite he has been researching geologic hazards such as rock falls and debris flows, and piecing together Yosemite’s glacial history. Greg enjoys sharing the story of Yosemite’s geology and makes it sound as fascinating as it really is.

See Greg Stock in action in Episode 10 of Yosemite Nature Notes, entitled "Rockfalls".