The Ahjumawi Lava Springs State Park is a state park in McArthur, California. It is known for its unique set up, situated mostly on top of recent lava flow.

Only accessible by boat, the Ahjumawi Lava Springs State Park is unique in this aspect among all of the units within the California state park system. Composed of six thousand acres worth of land area, the Ahjumawi Lava Springs State Park offers three campgrounds, each with three primitive campsites. More than 2/3 of the total area is covered by lava, which is mostly the reason for its rich environment.

To get to the Ahjumawi Lava Springs State Park, visitors could launch their boats at the public launch site known at Rat Farm.