| Big Muddy Creek | |
|---|---|
&sq=Facebook&lang=en&file=File:Lower_Nihotupu_Dam_and_Manukau_Harbour_(cropped).jpg) Big Muddy Creek seen from the Arataki Visitor Centre | |
 Route of the Big Muddy Creek | |
&sq=Facebook&lang=en&file=File:Auckland_Council_2019_Wards_Outlined_Blank.png)  Mouth of the Big Muddy Creek &sq=Facebook&lang=en&file=File:New_Zealand_(relief_map).png)  Big Muddy Creek (New Zealand) (New Zealand) | |
| Location | |
| Country | New Zealand |
| Region | Auckland Region |
| Physical characteristics | |
| Source | Lower Nihotupu Reservoir |
| • coordinates | 36°57′44″S 174°36′57″E / 36.96209°S 174.61595°E |
| • elevation | 65 m |
| Mouth | Manukau Harbour |
• coordinates | 36°58′34″S 174°37′29″E / 36.9762°S 174.6247°E |
| Basin features | |
| Progression | Big Muddy Creek → Manukau Harbour → Tasman Sea |
| Tributaries | |
| • left | Williams Stream, Finn Creek |
| • right | Shelly Lynn, Armour Stream |
The Big Muddy Creek is an estuarine tidal inlet of the Auckland Region of New Zealand's North Island. It flows south from its tributary rivers, the Nihotupu Stream and the Island stream in the Waitākere Ranges which are dammed at the Lower Nihotupu Reservoir, towards the Manukau Harbour.