Les Thermes Lons-le-Saunier at 14 Rue de Besançon draws on natural mineral springs whose therapeutic reputation in the Jura département of Bourgogne-Franche-Comté extends to antiquity, with Roman-era documentation of the local waters' curative properties. Lons-le-Saunier, the préfecture of the Jura, developed into a fashionable nineteenth-century spa town — its covered arcades, formal gardens, and kursaal still visible around the historic centre — and the Thermes continues that tradition as both a medical thermal centre and a leisure wellness venue. The spring water carries sodium chloride and sulphate minerals in concentrations suited to balneotherapy, with the water adjusted to therapeutic temperature before use. The indoor thermal pool is the facility's primary draw: a large basin maintained at 34–36°C, deep enough for free movement and aquatic stretching, its warmth encouraging extended soaking. Hydromassage baths — individual tubs with adjustable directional jets — are reserved by the session and draw a regular clientele managing lower-back pain, post-surgical rehabilitation, or chronic joint conditions. The Nordic sauna and steam room circuit allows guests to alternate between dry and humid heat, a thermal sequence associated with circulatory stimulation and respiratory benefit. The centre operates under partial medical supervision; a thermal physician is available for guests seeking a formal cure prescription, while leisure visitors access the same facilities on a day-visitor basis without a referral. A half-day pass covering pool and sauna costs approximately €22, and a full-day package inclusive of one hydromassage session is priced around €45. Walk-in thermal pool access is generally possible, but hydromassage bath reservations should be made in advance, particularly at weekends and during French school holidays. The town of Lons-le-Saunier also contains the birthplace of Claude Rouget de Lisle, composer of La Marseillaise, and its arcaded old town can be explored on foot as an afternoon complement to a morning Thermes visit.
Treatments
- Thermal pool bathing
- Hydromassage bath
- Nordic sauna and steam room
Location
14 Rue de Besançon, 39000 Lons-le-Saunier
Highlights
- Indoor thermal pool at 34–36°C fed by sodium chloride springs with a Roman-era therapeutic reputation
- Individual hydromassage baths with adjustable jets, popular for back-pain management and post-surgical recovery
- Nordic sauna and steam room circuit for circulatory and respiratory benefits
- Dual medical and leisure access: formal cure programmes and walk-in day passes from approximately €22
Tips for visiting
- Reserve a hydromassage bath session in advance, especially at weekends — the open thermal pool is first-come but private bath slots fill
- The full-day package (around €45) offers better value than combining separate admissions if planning to use pool and a treatment
- Bring a swimsuit and pool sandals; the facility sells disposable footwear if needed
- Combine a morning Thermes visit with an afternoon walk through Lons' arcaded old town and a visit to the Rouget de Lisle birthplace museum
Frequently asked questions
Is a doctor's prescription needed to use the thermal facilities?
Leisure visitors do not need a medical prescription for pool and sauna access. Multi-week medical cure programmes, which may qualify for reimbursement under French health insurance, require a thermal physician referral; the centre can arrange an initial consultation.
What are the mineral properties of the Lons-le-Saunier spring water?
The springs carry sodium chloride and sulphate minerals documented historically for rheumatological, gynaecological, and musculoskeletal applications. Leisure visitors benefit from the same water quality during pool and bath sessions without needing a medical prescription.
Are facilities accessible to visitors with limited mobility?
The main pool area has step-free access paths and pool-entry steps with handrails. Visitors with specific mobility requirements are advised to contact the centre in advance to confirm current access provisions and assistance available.
How far in advance should hydromassage bath sessions be booked?
Weekday sessions can often be booked one to two days ahead. Weekend and holiday periods fill faster; booking a week in advance is advisable during July, August, and French school holidays.