Unlike other mountains in the High Cascades, all these volcanoes became extinct 100,000 to 250,000 years ago.

Most of the High Cascades are therefore white with snow and ice year-round.

He considers High Cascade a late bloomer.

Because of the proximity of the High Cascades, stream density and water availability are high.

They are underlain by dark basalt in contrast to the gray andesite of the High Cascades.

The younger High Cascades to the east are believed to rest on sediments that accumulated in the basin between Siletzia and the continent.

Mount Bailey is part of the High Cascades in the western United States.

The large volcanoes in the range are called the High Cascades.

On the eastern side of the High Cascades, however, volcanoes erupted dacite, andesite, and rhyolite.

The High Cascades are much younger, around three to seven million years old.