🇦🇷 Argentina · The North
Termas de Río Hondo is, quite simply, the thermal spa capital of Argentina. In this town in western Santiago del Estero, on the banks of the Dulce river, hot mineral water rises from the ground and made the place nationally famous as a destination for health, rest and relaxation. What makes it unique: many of its numerous hotels have thermal water piped directly into the rooms, so a guest can take a hot mineral bath without leaving the bedroom. It is a destination designed from top to bottom around wellbeing.
But Termas is not just hot water. The town has been living a second moment of glory since 2014, when its international racing circuit —opened in 2008 and upgraded to world standards— began hosting the Motorcycle World Championship (MotoGP), on top of national car and motorcycle racing. Every year, the race weekend turns the spa town into a sporting party. To that add the great Río Hondo reservoir, an enormous sheet of water for fishing and boating.
This guide covers the essentials of Termas de Río Hondo with a practical, warm eye: how to make the most of the springs and the spas, what to do at the reservoir and the dam, the casino and life in the centre, the MotoGP circuit, how to get there and get around, and how to combine the destination with the Santiago capital and Tucumán. It is the ideal place to slow down, look after your body and really rest.
The area where Termas de Río Hondo stands today was known from pre-Hispanic times for its hot springs, used for healing by the Indigenous peoples of the Chaco-Santiagueño region. Through the colonial period and the 19th century, the site, tied to an old crossing or 'paso' on the Dulce river, gained a reputation for the properties of its waters. Real tourist development came in the 20th century: better roads and the railway, and then the building of hotels with thermal water in the rooms, made Río Hondo the country's main thermal centre, especially popular as a health destination for pensioners and families. The Dique Frontal dam and the Río Hondo reservoir (opened in 1967), on the Dulce river, added a great sheet of water for tourism and fishing as well as controlling floods and generating power; to fill it, the old town of Río Hondo had to be relocated and its original centre was left submerged beneath the lake. In recent decades, the town broadened its profile with the opening in 2008 of a racing circuit which, after being upgraded, began hosting the MotoGP World Championship from 2014, giving it international reach. Today Termas de Río Hondo combines its traditional calling for health and relaxation with the appeal of motorsport and boating. The full story is on our history page.
Read the full history ↓The 'Mother of Cities': the oldest city in Argentina, land of the Santiago Quichua language, of the chacarera and of the Chaco forest, deep heart of the criollo north and home to the largest thermal baths in the country.
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Origins, formation and what the sources say.
The history of Termas de Río Hondo is written in water, in more than one sense: the hot water rising from underground made it famous, and the water of the reservoir holds, submerged since 1967, the original town that gave it its name. Long before the town existed, this part of western Santiago del Estero, on the Dulce river, was known for the hot, mineral-rich springs that surfaced from underground. The Indigenous peoples of the Chaco-Santiagueño region —Juríes, Tonocoté and other groups of the plain— knew and used these waters for their properties, crediting them with healing and restorative virtues.
The area's thermal water comes from deep aquifers that heat up inside the earth and emerge loaded with minerals. That geological condition, along with the nearness of the Dulce river, made the site special from remote times. The tradition of using water for therapeutic ends, present in many cultures, found a privileged natural setting here.
Through the colonial period and the early years of independence, the region went on being known for its waters, though the place was little more than a rural site tied to an old crossing or 'paso' on the Dulce river. Real tourist and health use of the springs would come only with the development of roads, the railway and hotel infrastructure in the 20th century, which turned that natural gift into a nationally famous destination.
The place where the town stands today was historically tied to the Dulce river and to a crossing or ford where roads and mule trains passed. The name 'Río Hondo', meaning deep river, refers precisely to the character of the watercourse in the area. Through the 19th century, the place gained population around that crossing and around the rural activities typical of the Santiago plain: livestock, subsistence farming and use of the woodland.
The arrival of the railway in northern Argentina, in the last decades of the 19th century and the early 20th, was decisive in bringing the place out of its isolation. The rail link brought the site closer to the rest of the country and opened the possibility that its hot springs, already famous in the region, would start drawing visitors from further afield in search of health and rest. In 1884 the first lodging for bathers was built, and by 1902 —when the hamlet had barely some 300 inhabitants— close to 2,500 people a year were already staying at Termas de Río Hondo.
Over the years, more lodgings and public baths were set up around the springs, and the town settled on its calling: it would no longer be just a crossing point on the Dulce river, but a place people would go to specially to take its waters. The foundations of the country's most important thermal centre had been laid.
It was during the 20th century that Río Hondo turned definitively into the thermal capital of Argentina. Better roads and transport, along with growing interest in health tourism, drove the building of hotels, thermal baths and services designed for visitors coming to take the waters. The destination became especially popular with older travellers and with families looking for rest, relief from aches and pains, and a break.
The great feature that set Río Hondo apart from other thermal destinations was the development of hotels with thermal water in the rooms themselves: instead of communal baths, each guest could take a thermal bath in the privacy of their own room. That arrangement, uncommon elsewhere, became the destination's trademark and multiplied its appeal. The growth won institutional recognition: on 6 September 1954 Termas de Río Hondo was declared a city, and in 1958 it gained municipal autonomy. The town went on growing around a dense offering of hotels and spas, consolidating as the national reference for thermal bathing.
Alongside that, the economy and life of the area changed with the great engineering work on the Dulce river: the construction of the Dique Frontal dam and the Río Hondo reservoir. This dam made it possible to control the river's floods, supply water and power to the region and create an enormous sheet of water that added fishing, boating and outdoor recreation to the destination. The town thus consolidated a double profile: health and rest on one side; nature and water on the other.
The construction of the Dique Frontal dam on the Dulce river and the forming of the Río Hondo reservoir marked a before and after in the region's history. The works, on the boundary between Santiago del Estero and Tucumán, answered several needs: controlling the periodic floods of the Dulce river, regulating the flow for irrigating farming areas downstream, generating power and supplying water to the region. The process was long: the international tender was launched on 20 November 1957, the contract went to the company Panedile Argentina and the foundation stone was laid on 2 April 1958. Almost a decade later, in September 1967, the reservoir was opened. The dam is still impressive today: some 30 metres high and 4,325 metres long at the crest.
The works had their dramatic side too: to make room for the lake, in 1966 the old town of Río Hondo —originally called Miraflores, distinct from the town of Termas— had to be relocated some 21 kilometres from its original site. Its original centre was covered by the waters of the reservoir, where it remains submerged: a story of towns beneath the water that local memory still holds.
The result was one of the largest reservoirs in northern Argentina, an enormous artificial lake of some 33,000 hectares that changed the landscape and opened new possibilities. Bathing spots, boating clubs and shore roads were developed along its banks, and the sheet of water became a stage for sport fishing, water sports and nature tourism. The reservoir is also key to managing water across the whole Dulce river basin, which supplies the Santiago capital and vast areas of farmland. For Termas de Río Hondo, the dam meant adding a strong scenic and recreational draw to its calling for health and rest, consolidating the area as an all-round tourist hub in western Santiago del Estero.
In recent decades, Termas de Río Hondo has added a new and resounding draw to its traditional profile as a health destination: motor racing. In 2008 a racing circuit opened in the town which, after major upgrading works to meet the required international standards, took an enormous leap in 2014, when it began hosting the Motorcycle World Championship (MotoGP), the most important series on the planet in its class.
The arrival of MotoGP made Termas the Argentine home of the championship and gave it international reach. Every race weekend the spa town is transformed: fans arrive from all over the country and abroad, hotels are booked a very long way ahead, and a festive, sporting atmosphere takes over that contrasts with the usual calm of a relaxation destination. The circuit also stages national car and motorcycle competitions, which keeps it busy through the year.
This new side diversified the economy and the image of Termas de Río Hondo. To the traditional clientele of health and rest tourism was added a young, motor-loving public, and the destination gained worldwide visibility through the international broadcast of the races. Today, Termas comfortably combines its two souls: thermal water and rest, inherited from pre-Hispanic times, and the roar of engines that put it on the world's sporting map.
The Termas de Río Hondo of today is a destination of multiple identity, which has managed to combine very different traditions in one place. On one hand, it is still the thermal capital of Argentina, with its dense network of hotels offering thermal water in the rooms, heated pools, spas and a wide range of health and wellbeing treatments. It is one of the few destinations in the country designed comprehensively around rest and looking after the body, faithful to the calling that made it famous.
On the other hand, the Río Hondo reservoir brings the natural and recreational dimension: sport fishing, boating, the bathing spots and the sunsets over the water widen the visitor's options beyond the springs. And the MotoGP circuit adds the sporting side and international reach, with a race calendar that draws a new, younger public.
That combination —health, nature and sport— makes Termas de Río Hondo a singular destination in northern Argentina. Whoever comes looking for relaxation finds a wellbeing retreat; whoever wants nature has the reservoir; whoever wants adrenaline has the circuit. The town has managed to capitalise on its oldest gift, the hot springs, and combine it with new attractions, staying relevant as one of the main tourist destinations in Santiago del Estero and in the country.