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South Padre Island: Park Road 100, South Padre Island, Texas
Photo: Eric Friedebach · CC BY 3.0

Drives Texas Corpus Christi, the Coastal Bend and the Rio Grande Valley

South Padre Island: Park Road 100

TX 100, Padre Boulevard, Ocean Boulevard · Port Isabel → End of the pavement

Leisurely13.2 mi25 min0 ft climbHigh point ≈ 0 ftOne way
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The drive

This is the only road onto South Padre Island, driven all the way to where it stops. Highway 100 leaves Port Isabel and climbs onto the Queen Isabella Memorial Bridge, nearly two and a half miles across the Laguna Madre, then comes down into the town of South Padre Island and turns north as Park Road 100, Padre Boulevard.

The first few miles are town: four lanes, traffic lights, hotels and condos. North of town the buildings stop and the road narrows to two lanes through open dunes, with the Gulf on the right and the flats of the Laguna Madre on the left. It ends close to the barricades where the pavement runs out, about a dozen miles up the island, near Beach Access 6.

The north end is good birding country. Texas Parks and Wildlife lists the end of the pavement on its coastal birding trail: Peregrine Falcons in winter and migration, and Snowy and Piping Plovers feeding at the water's edge.

Along the way

  1. Port Isabel
  2. End of the pavement
Elevation
0 ft of climbing · high point ≈ 0 ft
Port IsabelEnd of the pavement
Curves
Mostly gentle curves
Port IsabelEnd of the pavement
GentleHairpins

Good to know

  • The causeway is the island's only road link, so every car on and off the island uses it.
  • Beyond the end of the pavement the beach is for four-wheel-drive vehicles only; don't take a regular car onto the sand.
  • Cameron County closes its beach access points to vehicles during very high tides.
  • The South Padre Island Birding and Nature Center, by the convention center, has boardwalks over the Laguna Madre; it charges admission.

Open all year, weather permitting. Roads close for snow, fire, storms and repairs: before you set off, check TxDOT DriveTexas.

Questions about this drive

How long is the drive from Port Isabel to the end of the road on South Padre Island?

Highway 100 and Park Road 100 from Port Isabel to the end of the pavement on South Padre Island is 13.2 miles and takes about 25 minutes.

How long is the Queen Isabella Causeway?

The Queen Isabella Memorial Bridge is about 2.4 miles long, crossing the Laguna Madre between Port Isabel and South Padre Island. It's the only road onto the island.

Can you drive past the end of Park Road 100?

Not on pavement. Park Road 100 ends a dozen miles up South Padre Island, and beyond it the beach is four-wheel-drive only.

What is there to see at the north end of Park Road 100?

North of the town of South Padre Island, Park Road 100 runs between dunes with the Gulf on one side and the Laguna Madre on the other. The end of the pavement is a stop on the state's coastal birding trail, known for plovers and, in winter, Peregrine Falcons.

What you get in the app

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Distance, time, elevation, curves and intensity are from Carve's route. Checked 2026-10-28.

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Map of South Padre Island: Park Road 100, from Port Isabel to End of the pavement