California golden trout
(Oncorhynchus aguabonita)

The California golden trout (Oncorhynchus aguabonita), is a species of trout native to California. The golden trout is normally found in the Golden Trout Creek (tributary to the Kern River), Volcano Creek (tributary to Golden Trout Creek), and the South Fork Kern River. The Golden trout is the official freshwater state fish of California since 1947.

The California golden trout is closely related to two rainbow trout.

The golden trout has golden flanks with red, horizontal bands along the lateral lines on each side and about 10 dark, vertical, oval marks (called parr marks) on each side. Dorsal, lateral and anal fins have white leading edges.

In their native habitat, adults range from 6 to 12 inches (15 to 30 cm) long. Fish over 12 inches (30 cm) are considered large.

Golden trout that have been transplanted to lakes have been recorded up to 11 pounds (5 kg).

The golden trout should be distinguished from the similarly named golden rainbow trout, also known as the palomino trout. The golden rainbow is a color variant of the rainbow trout.

The golden trout is commonly found at elevations from 6,890 feet (2,100 m) to 10,000 feet (3,000 m) above sea level, and is native to Californias southern Sierra Nevada mountains. Outside of its native range in California, Golden trout are more often found in cirques and creeks in wilderness areas that are not passable without crampons, ice axes, and ropes until after the Fourth of July. Their preferred water temperature is 58 to 62 °F (14 to 17 °C) but they can tolerate temperatures in degraded streams on the Kern Plateau as high as 70 °F (21 °C) so long as those waters cool during the night. The only other species of fish indigenous to the native range of California golden trout is the Sacramento sucker (Catostomus occidentalis occidentalis).