Mt Shasta is 40 miles (65 km) south of the California-Oregon border. At 14,161 feet (4,317 meters) it is the second highest mountain in the Cascade Range. It is an active volcano, and last erupted in 1786.

In this view from the south on I-5, you can see the cinder cone Shastina on the west flank of the mountain.

The cinder cone Black Butte, located west of Mt Shasta, is comprised of four lava domes.

We visited Crater Lake in southern Oregon on the way home. Mt Mazama had erupted 7,700 years ago, creating a caldera which filled with water to create the lake. With a depth of 1,932 feet (589 meters), it is the deepest lake in the USA and the seventh deepest in the world. It is noted for its pristine deep blue water.

Wizard Island, on the west side of the lake, is a cinder cone that grew soon after the climactic eruption of Mount Mazama. It rises 760 feet (233 meters) above the lake and there is a crater on its summit.

On the south-east side of Crater Lake is a formation known as Phantom Ship. It is a remnant of an old Mt Mazama lava flow from about 400,000 years ago. The mountain peak in the distance at left is Mt Thielsen.

Here's a view of the west side of Mt Thielsen, as we approached it from north of Crater Lake. It is 9,182 feet high, and last erupted 300,000 years ago.