The Four Seasons Resort and Residences Napa Valley, set to open 1 November, has revealed new details of the California resort and its wellness spa.

Designed by Napa’s own Erin Martin and set in a vineyard, The Four Seasons Napa Valley will be an intimate retreat, featuring just 85 farmhouse-style accommodations.

The resort’s Grand Roca Spa will offer Cailstoga Mud Experiences, inspired by the area’s 150 years of history as a spa destination.

Signature treatments will incorporate mineral-rich mud from the property, which will be massaged onto the skin before guests bathe in the sun in an outdoor mud garden to allow the earth to draw toxins from the body.

A ‘Seed to Skin’ programme will use Napa Valley’s famed grape seeds and their potent antioxidants and polyphenols, flavonoids and anthocyanins, which are said to help to neutralise and eliminate harmful free radicals on the skin.

Specialised treatments incorporate grape seeds and olive oil produced from the century-old olive trees found on the property. An exfoliating scrub of sugar and grape seeds is designed to leave skin with a soft, luminous glow.