Smuggler's Gulch is where Matadero Canyon crosses from Tijuana into the U.S. It regularly carries trash, sewage, and sediment into the Tijuana River Valley.
Why it matters
Debris here causes flooding at Monument Road, clogs the U.S. canyon collector, and ends up in the estuary. The county has dredged the channel roughly once a year to keep it flowing.
Where it stands (as of September 2026)
- The Smuggler's Gulch Improvement Project combines two projects from the county's 2020 Tijuana River Valley assessment: a sediment basin, a replacement for the undersized road culvert, and trash capture devices.
- It's fully funded by the California State Coastal Conservancy and, as of January 2026, was in design and environmental review.
- Separately, the county removes trash from the channel and its existing booms, and dredging in 2023 and 2024 cleared the way for the new infrastructure.
Who's responsible
San Diego County Parks and Recreation. The culvert under Monument Road belongs to the City of San Diego.
What to watch
A construction start date. Mexico's new sediment basin upstream in Matadero Canyon should reduce the load reaching it.
Related
Matadero Canyon sediment basin. The trash boom.
Sources
- San Diego County Parks, Tijuana River Valley improvements
- California State Coastal Conservancy, Smuggler's Gulch Improvements Project, May 2021
- 10News, Smuggler's Gulch cleanup underway, January 2026
- CEQAnet, Smuggler's Gulch trash and debris removal, 2026