The name Le Grand is from one of the officers on L'Espérance, one of the ships in the 1792 expedition of Bruni d'Entrecasteaux.

[6][7][8][9] The largely granite shoreline and white sand beaches are picturesque features of the area.

[10] Further inland, the park comprises mostly heath-covered sandplain, interspersed with swamps and pools of fresh water.

Wildflower blooms peak in the austral spring, lasting until October and species such as blue china orchid Cyanicula gemmata, Diuris corymbosa, Hakea laurina, Thysanotus sparteus and Thelymitra macrophylla are represented within the park.

Facilities include toilets, barbecues, campsites, tables, sheltered areas, walk trails, information bays, and water tanks.