
The Sacramento River meanders along the eastern edge of this landscape, defining the boundary between Colusa and Sutter counties and creating dramatic bends such as Ogden Bend and Girdner Bend. In the fertile lowlands of the Sacramento Valley, the town of Grimes serves as a central hub, connected by a network of rural roads like Grimes-Arbuckle Rd and Tule Rd. The area's agricultural character is evident through the complex irrigation systems including the Colusa Trough, Main Canal, and the Colusa-Basin-Drainage-Canal.
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