- KindResource boulder
- GivesSulfur
- PickaxeFlint Pickaxe
- Spots on the map137
- Named places6
The Sulfur Boulder is a boulder you break with a pickaxe to get Sulfur. It takes a Flint Pickaxe, which mines Sulfur, Copper, Coal, Flint and Stone. The Stone Pickaxe only mines Flint and Stone, so it will not break this one. Aim at a boulder and the prompt shows its name with a pickaxe icon. A red, crossed icon means the tool in your hand cannot break it.
The map has 137 Sulfur Boulder spots, and the largest group sits around Sonnenberg's Clinic, with 42 nearby. Rat Queen's Crossing comes next with 16, then Horizon and the Solar Power Plant with 5 each. Another 64 spots are out in the open, away from any named place, so keep an eye out for them while you travel between locations.
Sulfur Boulder spots by named place
| Named place | Type | Spots |
|---|---|---|
| Sonnenberg's Clinic | Safe zone | 42 |
| Rat Queen's Crossing | Meeting place | 16 |
| Horizon | Safe zone | 5 |
| Solar Power Plant | Safe zone | 5 |
| Shallow Rift | Scavenging area | 3 |
| Landscar Cave | Cave | 2 |
| Away from any named place | — | 64 |
Other boulders
| Boulder | Pickaxe | Spots |
|---|---|---|
 Rock Boulder | Stone Pickaxe | 218 |
 Flint Boulder | Stone Pickaxe | 200 |
 Iron Boulder | — | 196 |
 Coal Boulder | Flint Pickaxe | 163 |
 Copper Boulder | Flint Pickaxe | 136 |
 Gold Boulder | — | 109 |
 Moonrock Boulder | — | 54 |