The Port Hedland to Broome route on Highway 1 is some 661 kms long. Along the way, between the Pardoo Roadhouse and Lagrange, there is the Eighty Mile Beach.
If your travelling north along Highway 1, note that the Pardoo Roadhouse is the last fuel station till you reach Sandfire.
There are beach camping areas and caravan parks along the way, although they may up to 23 km west of the highway.