Ahjumawi Lava Springs State Park is a state park of California in the United States. It is located in remote northeastern Shasta County and is only accessible to the public by boat.
The park is in length and no more than wide, and has over of shoreline. It preserves a wilderness of freshwater springs and geologically recent lava flows. Waterways include the Fall River and associated creeks and lakes. The shoreline has blue bays and tree-studded islets along its length. Near the springs are the remains of fish traps built by Native Californian tribes such as the Achomawi, for whom the park is named. Low rock walls enclose shallow pools where they captured sucker and trout. About two thirds of the park's is covered by jagged black basalt deposited in lava flows within the last two to five thousand years.
Visiting the park
There are no public roads leading to the park. Private motor vehicles are prohibited within. Visitors can launch boats into Big Lake at a Pacific Gas & Electric (PG&E) public boat launch known as Rat Farm.
The park is in an area where the Modoc Plateau transitions to a more coastal bioregion. The former region was formed by volcanic activity and has many associated geological features, such as lava tubes and craters that fill with spring water.