The High Cascades ecoregion in California is less defined as are those areas of the northern two states and some geographical designation communities claim that this ecoregion does not exist in California and that the High Cascades ecoregion changes to the Klamath Mountains ecoregion.

In fact, what happens to the Cascade Mountains is found in the Oregon Cascade-Siskiyou National Monument. From this monument, the Cascade range is cut by the Klamath River and the wide Hornbrook valley which has few roads. The Cascade Mountains do rise to Goosenest at elevation 8280 feet about twenty-five miles to the south and then the range widens as it continues southward to include Mount Shasta and Mount Hoffman, also know as Medicine Lake Volcano.

However, at the Oregon Cascade-Siskiyou National Monument, the bulk of the Cascade mountain range turns westward, crosses IH 5 in Siskiyou pass at elevation 4465 feet and continues along a spur range of the main Klamath Mountains for another thirty mile, as does the PCT as it enters California. This spur range, called the Siskiyou Mountains range, leads to the main ridge of the Klamath Mountains at where the Klamath River cuts through the range. Then the main ridge trends southward through Marble Mountain Wilderness and then Russian Wilderness to Packers Peak. However, the PCT turns east just before arriving at Packers Peak onto another spur range called Scott Mountain turning east and

When looking at the bottom of the High Cascades in Oregon, it does so transition southwesterly into the Klamath Mountains. However, the High Cascades does continue, not southwesterly, but directly south and just east of the Klamath Mountains. This range of the High Cascades traverses into Californa from the

The Cascade Range or more commonly called The Cascades is a North American Pacific Coast Region mountain range, extending from southeastern British Columbia through eastern Washington, eastern Oregon and into Northern California.

The Cascade Range includes the volcanic mountains in southeast British Columbia, referred to as the Canadian Cascades, the non-volcanic mountains in north Washington known as the North Cascades, and the notable long series of volcanoes from southeast Washington through to north California known as the High Cascades.

The highest peak in the Cascade Range is Mount Rainier, with an elevation of 14,411 (4,392 m) and located in Washington about fifty miles southeast of Seattle.

Indian Well Campground

Mount Shasta (14,179 feet), a dormant volcano;

Lassen Peak (10,457 feet), an active volcano

Eagle Peak (Warner Mountains 9,892 feet);

Crater Peak (9,671 feet)

Ash Creek Butte (8,378 feet);

Goosenest (8,280 feet);

Medicine Lake Volcano (Mount Hoffman 7,913 feet);

Herd Peak (7,071 feet);

Sheep Mountain (6,210 feet);

Blue Mountain (5,740 feet);

Mount Bradley (5,556 feet);

Lava Beds National Monument

Petroglyph Point, Lava Beds National Monument

Pacific Crest Trail

Volcanic Legacy Scenic Byway