The Ciril (S."Deep-cutting River") was one of the two main watercourses in the Lamedon vale, and was the principal tributary of the Ringló. The Ciril was fordable at Calembel, but its depth was nevertheless too variable to permit navigation by anything besides flat-bottomed boats. Above Calembel, the river was not navigable at all. Like all other major rivers of southern Gondor, the Ciril had its sources in the White Mountains.