Thermal Circuit at the Caldes de Boí Spa

Caldes de Boí is the spa at the end of the L-500 road, at the head of the valley, at 1,470 metres. It is fed by 37 springs that emerge at between 4 and 56 °C, and around them are two hotels, the Manantial and the Caldas, with the thermal centre connected inside. You do not need to sleep there: the thermal circuit is sold by sessions to anyone who books.

€45 circuit, €50 route and separate steam rooms

The thermal circuit lasts 55 minutes and costs €45 per person. The thermal route is something else: 50 minutes and €50, with natural steam room, circular shower, pressure shower and inhalation, and it can only be booked for two or more people. The natural steam rooms, the spa's steam baths, can also be booked separately: 10 minutes from €26.

For families there are two fixed rates for 55 minutes: €95 for two adults and one child, and €112 for two adults and two children. The menu adds tartera baths with hydromassage, showers, massages and mud treatments, the latter only after a medical consultation (€48 if you are not staying there).

Children: only from 16:30 to 17:30

Children under 7 do not enter the circuit. From 7 upwards they enter in a slot of their own, from 16:30 to 17:30, with a children's admission of €15. If you are going with children of that age, organise the afternoon around that hour and ask for that slot when you book: outside it the circuit is adults only.

Flip-flops, cap and swimwear are compulsory for everyone. Bring your own; the website does not say whether they sell or lend them.

The outdoor pools are for summer

Next to the Hotel Manantial there are two outdoor pools fed by the Font del Bou and the Font del Boix, one at 28–30 °C and the other at 9 °C. They only open in summer: in 2025 it was from 21 June to 6 September, with a day ticket at €18 for non-guests. In the snow season do not count on them.

From December to April, call before going up

The spa does not publish opening hours or dates for the thermal centre for winter 2026-27, and there is no date on its website after the summer season. Before making the trip from Boí, call 973 69 62 10 or write to [email protected] and book your time. If it is closed, the Spa Siente Boí at the Pla de l'Ermita is the alternative with hot water in the valley.

Caldes is beyond the Boí turning. About 2 km before it is the Palanca de la Molina car park, where the walk up to Aigüestortes begins; if you do not feel like walking, the park's 4x4 taxis go up from the Boí square.