Cromberg Spring on east side of FS23N11 (spring run collected on west side), ca. 0.1 road miles south of mouth of Cogswell Ravine, east of CA70/89. Rivers/Creeks: Unnamed Cr.-Jackson Cr.-Middle Fk. Feather R.-Feather R.-Sacramento R., Sierra Nevada. Plumas National Forest., Plumas County, California, United States