Bouldin Island
Bouldin Island is an island in the Sacramento-San Joaquin River Delta in San Joaquin County, California, 20 kilometers (12 mi) northwest of .
The 2,400 ha (5,900-acre) island is bounded to the north by South Mokelumne River which separates the island from Staten Island. To the east, the island is bounded by Little Potato Slough, to the south by Potato Slough, and to the west by the Mokelumne River.
State Route 12 crosses the northern section of Bouldin Island, which is also called Kettleman Lane on the island.
A swing bridge over the Mokelumne River on SR 12 connects the northwestern part of the island to Andrus Island. Near the northeastern tip of Bouldin Island, a high-level bridge on SR 12 spans Little Potato Slough connecting the island to .
Coordinates: 38°06′15″N 121°32′05″W / 38.104086°N 121.534675°W
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