Fairmont Scottsdale Princess hotel and spa in Arizona is entering the final phase of its five-year, $60m expansion, which will debut in November.

The 65-acre resort is located in front of the Arizona's McDowell Mountains and has 649 guest rooms including two presidential suites, 69 Fairmount Gold Rooms and 119 Casitas.

The latest additions to the resort are part of a five-year, $75m renovation plan by the resort's owner, Strategic Hotels & Resorts, since it acquired the Princess in 2006.

A wellness and integrated medicine programme is being added to the resort’s Willow Stream spa. It will allow guests to personalize their spa experience and to sustain the benefits once they leave. The programme will include cooking demonstrations, guest lectures and innovative fitness equipment and classes.

Facilities at the 44,000sq ft (13,411sq m) Willow Stream include an atrium, canyon oasis, waterfall treatment area, rooftop mesa adult swimming pool and private cabanas and spa suites for couples. There are also separate lounge areas for men and women, which include saunas, eucalyptus inhalation rooms and private showers.

A bespoke product line, Willow Stream ener.g has been created for the spa by Kerstin Florian International.

The treatments are inspired by local traditions and use plants and herbs with a range designed for specific results in stress relief, skin care or reducing the appearance of fine lines.

The signature treatment is the two-hour Havasupai Falls Rejuvenation, which involves mixing ultra-fine Utah desert salts with indigenous essential oils to exfoliate the body. Then, an application of jojoba body butter prepares the skin for a warm massage with smooth riverbed stones, which targets tired muscles. A scalp massage completes the experience.

Other signature treatments available are the Arizona Eucalyptus Salt Scrub and the Desert Purification.

The hotel has also added new dining options including the Bourbon Steak offering with a strong focus on all natural organic and hormone-free cuts of beef and La Hacienda by Richard Sandoval featuring a variety of light Mexican food.

A $20m Palomino conference centre is being built by Howard S. Wright Construction, which will add 52,331 sq ft (15,950sq m) of indoor meeting space anchored by the new 23,000sq ft (7,010 sq m) Palomino Ballroom.

Other facilities at the resort include five swimming pools and two adjacent TPC Scottsdale championship 18-hole golf courses.