The Viejas Band of Kumeyaay Indians, which owns the Viejas Casino & Resort near San Diego, California, has confirmed the opening date for its wellness-focused extension.

Called The Willows Hotel & Spa, the new property will open to the public in February.

Completing the third phase of redevelopment plans for the property, the extension has been designed as a resort within a resort, focusing on a holistic approach to promote wellness.

Housing 159 suites, the extension will be marketed as an adults-only, tranquil retreat featuring wellness amenities including a new saltwater pool, a luxurious spa, salon and health club.

Facilities at the Willows Spa include seven treatment rooms, a tranquillity garden, salt sauna, steamroom and two outdoor treatment cabanas.

The spa’s salt pool will also have a dedicated space for meditation and poolside massage treatments.

“We're thrilled to add the adults-only pool and spa to this facility,” said Viejas tribal chair Robert J Welch Jr.

“Our spa will be world class and will attract a distinguished clientele from all parts of the western US to experience this modern, luxurious yet inviting concept.”

As well as the wellness areas and 159 suites, the tower will house three new restaurants and expanded gaming space.