Aller (Asturian river)
| Aller Ayer | |
|---|---|
|  The Aller river in Bustiello | |
| Location | |
| Country | Spain | 
| State | Asturias | 
| Physical characteristics | |
| Source | Cantabrian Mountains | 
| Mouth | Caudal | 
|  • location | near Ujo, Asturias, Spain | 
|  • coordinates | 43°12′0″N 5°47′0″W / 43.20000°N 5.78333°W | 
| Length | 42 km (26 mi) | 
| Basin size | 280 km2 (110 sq mi) | 
The Aller is a river in northern Spain flowing through the Autonomous Community of Asturias.