| Helatoba-Tarutung | |
| Elevation M: | 1,100 |
| Location: | North Sumatra, Indonesia |
| Type: | fumarole field |
| Last Eruption: | Pleistocene |
Helatoba-Tarutung is a group of sulfurous hot springs in the south of Lake Toba, North Sumatra, Indonesia. It stretches 40 km along the Renun-Toru geological fault zone.[1] The last eruption took place during the Pleistocene age.