 | This article relies largely or entirely on a single source. (June 2024) |
| Little Boulder River | |
|---|---|
 Route of the Little Boulder River | |
.png)  Mouth of the Little Boulder River   Little Boulder River (South Island) | |
| Location | |
| Country | New Zealand |
| Physical characteristics | |
| Source | |
| • location | Lookout Knob |
| • coordinates | 40°49′09″S 172°35′36″E / 40.8191°S 172.5932°E |
| • elevation | 535 metres (1,755 ft) |
| Mouth | |
• location | Aorere River |
• coordinates | 40°46′00″S 172°35′50″E / 40.7666°S 172.5971°E |
| Basin features | |
| Progression | Little Boulder River → Aorere River → Ruataniwha Inlet → Golden Bay / Mohua → Tasman Sea |
| Tributaries | |
| • left | Bert Creek, Graham Creek |
The Little Boulder River is a river of the Tasman Region of New Zealand's South Island. It flows from its sources within Kahurangi National Park to reach the Aorere River south of Collingwood.