The Rioulan is a small river that flows through the
Alpes-Maritimes
Alpes-Maritimes (; oc, Aups Maritims; it, Alpi Marittime, "Maritime Alps") is a department of France located in the country's southeast corner, on the Italian border and Mediterranean coast. Part of the Provence-Alpes-Côte d'Azur region, it ...
department of southeastern
France
France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...
. It is long. It flows into the
Estéron
The Estéron is a river that flows through the Alpes-de-Haute-Provence and Alpes-Maritimes departments of southeastern France. It is long. Its drainage basin is .Sigale.