Tonic Health & Day Spa

At a glance

  • Hotel spa

    Hotel Spa Venue

    The four star hotel offers a range of spa and leisure facilities.

  • Child friendly

    Family Friendly

    There is a separate pool for babies and toddlers, and children’s swimming lessons are available.

  • Shopping


    Castleknock Hotel is just 15 minutes from Dublin city centre, and is close to the Blanchardstown Shopping Centre.

  • Golf


    The hotel is surrounded by an 18-hole golf course named as one of the top 100 courses in Ireland by Golf Digest Magazine.

  • Scenery

    Scenic Location

    Providing the best of both worlds, the hotel is surrounded by countryside, whilst being within easy reach of Dublin.


Castleknock Hotel, Porterstown Road, Castleknock, Dublin 15
Porterstown Road, Castleknock, Dublin 15

Castleknock Village, 6 miles from Dublin city centre, 8 miles from Dublin International Airport.

Spa & Leisure

The Tonic Fitness Centre at Castleknock Hotel and Country Club embodies all aspects of health and fitness. Aiming to help guests with everything from weight management to sports rehabilitation and nutritional advice, there are on-site trainers, Pilates and exercise classes, a gym, 18-metre pool, sauna, steam room and Jacuzzi, all of which enjoy 220 degree views of the golf course, lake and surrounding countryside.

There is also a day spa area with a relaxation lounge, which extends the experience from the wet facilities, with a little added decadence. Using Parisian brand Payot, they offer a comprehensive range of treatments including massage, waxing, facials, spray tans, manicures and pedicures, and welcome both solo guests as well as group travellers.

Hotel & Accommodation

Just 15 minutes from Dublin city centre, but still surrounded by acres of greenery thanks to the surrounding golf course, Castleknock Hotel is the best of both country and city worlds when it comes to a weekend break. A fusion of contemporary and traditional design, the original building has been accompanied by a number of contemporary additions in recent years, which give the four star hotel its unique character.

To complement the different aspects of the hotel’s design and location, it is fitting that there is also a variety of bars and restaurants within its walls. The contemporary Brasserie is a relaxed environment for informal dining, while the Park Restaurant is an elegant, award winning location best loved for its steak. Meanwhile, the Fionn Ulsce Bar is designed for a glass of wine after your meal, and the Lime Tree Bar is a romantic setting for cocktails or an aperitif.