Ahjumawi Lava Spring State Park is an outdoor area with an abundance lava rock. The park features over twenty miles of park trails by which to explore the area.
The park is located in remote northeastern Shasta County and can only be reached by boat.
Visitors can launch into Big Lake at a PG&E public boat launch known as "Rat Farm".
It is reached from McArthur by turning north off Highway 299 on to Main St., continuing past the Intermountain Fairgrounds, crossing over a canal and proceeding 3-miles north on a graded dirt road ending at a dirt launch ramp.
