Baile Felix is a thermal spa resort near the commune of Sânmartin in Bihor County, Transylvania, Romania. Baile Felix is at a close distance to Oradea, a major city in western Romania.

Baile Felix and 1 Mai are two thermal spa resorts located in a hilly area with birch and oak tree woods, 8 km south of the municipality of Oradea (seat of Bihor County) and 22 km south-east of Bors (border checkpoint to Hungary). The resort lost its passenger railway service in 2014.

The resorts host many mineral springs with thermal (20-48°C), sulphuric, calcic, sodic, rich in bicarbonate waters known since the beginning of the millennium. The soothing effect of the waters on articular and muscular pain and on various rheumatic neuralgias accounts for the fame of cures in the resort for the treatment of inflammatory rheumatic diseases (rheumatic polyarthritis, rheumatoid spondylitis, conditions after acute articular rheumatism), degenerative and articular rheumatic diseases, central and peripheral neurological disorders, gynecological diseases, post-traumatic conditions, endocrine disorders.

The facilities of the two resorts offer treatment of rheumatism and neurological and gynecological diseases. The modern medical base has at its disposal various facilities for procedures involving electrotherapy, hydrotherapy, aerosols, massage, paraffin packing and other water treatments.