This Northern California Mountain Has the Most Fascinating Geological Story
Mount Tamalpais is often considered the symbol of Marin County. Locals affectionately refer to it as Mount Tam, and hikers come from all over the state to get a glimpse from the top of the peak. Located north of San Francisco, Mount Tam is situated perfectly to give hikers breathtaking views from above the clouds, overlooking San Francisco, the Pacific Ocean, and the scenic slopes. In addition to the beautiful scenery Mount Tam offers, the mountain also has a fascinating geologic background. Read on to learn more about what makes Mount Tam as frightening as it is beautiful.

Marin Hills is a portion of the Northern California Coast Ranges, which run along the Pacific Ocean.


For its beauty and ecological significance, much of the mountain is contained in protected public lands.

The mountain is the result of uplift and folding of the North American plate sliding along the Pacific Plate, near the San Andreas fault zone.

If one does exist under Mount Tam and it ruptures, the result could be a devastating earthquake for the North Bay, San Francisco, and the surrounding region.

For now, all locals can do is admire the mountain for what it's worth: a gorgeous natural phenomenon that makes for great exercise and beautiful scenery.

The diversity of microclimates on the mountain makes it possible for all kinds of trees to thrive, including Coast Live Oak, California bay, madrone, and canyon live oak.

The ocean-facing valleys of Mount Tam will be cooler and foggier, while the manzanita slopes are hot and dry. At the summit, you'll enjoy cool weather and a comfortable breeze.

Have you been to Mount Tam? Which trail to the top was your favorite?