The Queiles is a

tributary A tributary, or an ''affluent'', is a stream or river that flows into a larger stream (''main stem'' or ''"parent"''), river, or a lake. A tributary does not flow directly into a sea or ocean. Tributaries, and the main stem river into which they ...

of the

Ebro The Ebro (Spanish and Basque ; , , ) is a river of the north and northeast of the Iberian Peninsula, in Spain. It rises in Cantabria and flows , almost entirely in an east-southeast direction. It flows into the Mediterranean Sea, forming a de ...

. Its arises in Vozmediano (

Soria Soria () is a municipality and a Spanish city, located on the Douro river in the east of the autonomous community of Castile and León and capital of the province of Soria. Its population is 38,881 ( INE, 2017), 43.7% of the provincial populatio ...

). It flows through

Tarazona Tarazona is a town and municipality in the Tarazona y el Moncayo comarca, province of Zaragoza (province), Zaragoza, in Aragon, Spain. It is the capital of the Tarazona y el Moncayo Aragonese comarca. It is also the seat of the Roman Catholic Dio ...

and empties into the Ebro near

Tudela, Navarre Tudela is a municipality in Spain, the second largest city of the autonomous community of Navarre and twice a former Latin bishopric. Its population is around 35,000. The city is sited in the Ebro valley. Fast trains running on two-track electri ...

See also