Castle Crags State Park, Granite formations and hiking trails in Shasta County, California.

Castle Crags State Park is a California state park in Shasta County, near Castella, centred on a granite massif whose highest point reaches 1,833 metres. The park lies at about 1,215 metres above sea level, with forested slopes and the Sacramento River running through it. It is roughly 16 km south of Mount Shasta.

The granite formations in this park developed over 170 million years ago and were later shaped by erosion into the striking peaks seen today. Indigenous peoples inhabited and used this region for thousands of years before the arrival of European explorers and settlers.

The park lies in Shasta County, about 15.8 km south of Mount Shasta, on slopes rising to 1,833 m near the 1,215 m park area. The surrounding forest is dominated by coniferous trees, and fewer than two people live per square kilometre in the area. Visitors can look for the granite crags above the Sacramento River corridor.

Castle Crags State Park lies off Interstate 5 at Castella, about 15.8 km south of Mount Shasta, at roughly 1,215 m elevation. Camping and day-use areas sit along the Sacramento River, with trails climbing toward the crags at 1,833 m. Expect a Mediterranean climate: about 11 °C average, roughly 804 mm of rain a year, and snowy, forested slopes in winter.

The Sacramento River runs through the park and creates verdant riparian corridors amid the granite landscape, surprising many visitors who expect only rocky heights. This blend of flowing water and jagged peaks creates a diverse setting that feels different from typical mountain terrain.