The UCSB Campus Lagoon is a scenic, 31-acre brackish water body on the UC Santa Barbara campus, bordered by the Pacific Ocean to the south. It features a 1.5-mile loop trail, a central peninsula known as Lagoon Island, and diverse coastal wildlife.

The gateway to the lagoon trail is at the end of Lagoon Road on the east side of the UCSB campus. Parking fees are required for designated coastal access parking spots. The trail along the north side of the lagoon is paved, while the south side is a combination of dirt, sand and paved surfaces. The loop walk takes amblers past a popular beach, noted surfing area at Campus Point and across the coastal bluffs.