| Styx River | |
|---|---|
&sq=&lang=&file=File:Styx_River_no_watermark.jpg) The Styx River near Spencerville | |
 | |
| Location | |
| Country | New Zealand |
| Physical characteristics | |
| Source | |
| • location | Harewood |
| Mouth | |
• location | Waimakariri River via Brooklands Lagoon |
| Length | 24.8 km (15.4 mi) |
| Basin size | 50 km2 (19 sq mi) |
The Styx River (Māori: Pūharakekenui) runs along the northern boundary of Christchurch, New Zealand before flowing into the Waimakariri River close to its mouth via Brooklands Lagoon.