The narrow tunnel spans more than 800 yards but could be even longer because its route zigzags.

The opening on the U.S. side was discovered in a lot full of wood scraps in San Diego. Officials say the tunnel started in a home in Tijuana and had a fully functioning elevator leading into it.

The tunnel entrance on the San Diego side was just a small hole in the ground that was covered with a large dumpster.

Officials say tunnels are being used more and more to ferry drugs into the U.S. This discovery comes the same week border patrol agents found a much smaller tunnel that crossed the California-Mexico border.

This video includes images from the U.S. Attorney's Office.

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Students line up after school for school buses at Sequoyah Middle School in Doraville on Wednesday, Dec. 10, 2025. The school’s principal told teachers not to talk to students about ICE, and teachers and activists are pushing back. (Arvin Temkar/AJC)

Credit: arvin.temkar@ajc.com