Hutt Lagoon, also known by its Aboriginal name Yallabatharra, is a large salt lake situated on Western Australia's Coral Coast near the small fishing village of Port Gregory, in the Shire of Northampton. The lagoon covers approximately 70 square kilometres, making it one of the largest salt lakes in the region. It lies a few metres below sea level and is separated from the Indian Ocean by a beach barrier ridge and dune system. The lagoon is fed by marine waters through underground springs rather than surface runoff.

The water's distinctive pink to bubblegum-red colouration results from extremely high salinity levels and the presence of a beta-carotene-producing microalgae. The colour shifts across a spectrum from red to bubblegum pink to lilac purple depending on the time of day, season, and cloud cover. Midday, roughly between 10am and 2pm on clear days, tends to produce the most vivid hues, though sunset visits also yield striking colour changes.

Paddlers considering Hutt Lagoon should be aware that a portion of the lagoon is leased by BASF for commercial microalgae production, and entry into that area is not permitted. The extremely high salinity means any open cuts or abrasions will be painful on contact with the water. The salinity also provides significant buoyancy. There are no dedicated paddling launch facilities noted at the lagoon; access points are informal, with pull-offs along Port Gregory Road and George Grey Drive. Some areas along George Grey Drive involve muddy patches near the water's edge.

Port Gregory village, situated between the lagoon and the beach, offers basic amenities including a general store, public toilets, and a caravan park. There is no public transport to the area, so a vehicle is essential. The lagoon attracts notable birdlife, including red-banded stilts, which are drawn to the brine shrimp present in the water. Visiting between July and September also coincides with wildflower season across the surrounding countryside. The lagoon sits roughly one hour north of Geraldton and 35 to 45 minutes south of Kalbarri, making it accessible as part of a broader coastal road trip rather than a comfortable day trip from Perth, which is approximately five and a half to six hours south.