They are part of Comondú municipality of the Mexican state of Baja California Sur, and situated about 300 kilometres (190 mi) west of the mainland.
The rocks in between those are either submerged or so low that they are barely visible among the heavily breaking waves.
[3] The group is located at the transition zone between two major biologic provinces, at a latitude where the Pacific Current turns westward to form the North Pacific trans-oceanic current.
The breeding marine avifauna of Alijos Rocks currently consists of Leach's storm-petrel (a presumed breeder, probably a few pairs), red-billed tropicbird (14 birds), masked booby (100), and sooty tern (250).
The Laysan albatross is currently an annual visitor to Alijos Rocks during its winter breeding season, and may start to nest there in the near future.