In the morning, we joined a Ranger program on Pothole dome called “Fire and Ice” that talked about the glacial and volcanic processes that created Yosemite.

Ranger Mike handed out magnifiers and we inspected the granite to identify its components:

The dikes, volcanic material squirted up through cracks in the stone, were interesting:

Wherever a crack forms and water is trapped, Lodgepole Pines take root:

The unicorn on the distance:

There were quite a few glacial erratics, blocks of stone carried by the glaciers and left behind when the glaciers melted away.  The erratic below is the size of a washing machine:

In the afternoon, we went for a bike ride.  Everyone rode together for the first five miles:

Trish took the kids back and I continued on for a total of 15 miles out and back. 

There were great views at Olmstead Point.  Half dome (from the opposite angle from the common view from Yosemite Valley) is on the right:

Tenaya Lake on the way back:

Another great day in Yosemite!

Here are the ride stats: