Macquarie Pass is a 8 kilometre long section of the Illawarra Highway passing through Macquarie Pass National Park. It was opened in 1898. Macquarie Pass links the Southern Highland town of Robertson to the coastal town of Albion Park, descending the Illawarra Escarpment via a very narrow bitumen roadway, which has several single lane sections, and for the most part is two lanes with double "no overtaking" lines. It is in the Shellharbour LGA.
This section of roadway is very steep, and contains a large number of hairpin bends, resulting in buses and trucks needing to reverse on some of the bends. The pass is quite notorious for accidents due to its nature, and drivers and riders are required to be cautious.
After heavy rain, the Macquarie Pass can be closed due to flooding on the top half of the pass. Cars and motorbike riders may opt to use Jamberoo Mountain Road between Robertson and Jamberoo, while trucks are advised to use Mount Ousley Road (Southern Freeway) and Picton Road as an alternative.