"The rustics of Anfalas seem to delight in devising new and ingenious ways to distort the King's Sindarin. We need not inform His Majesty of the laws governing consonantal changes in Sindarin, whereby an adjective such as calen "green" becomes "galen" as the second element in a name, such as in "Tol Galen", the "Green Isle" where Beren Ercharmion and Lúthien dwelt long ago. Of course such adjectives as calen retain thir normal form as the first element in names, and we can only surmise that the good people of Galenhirost altered this name from its proper form Calenhirost on mistaken analogy With other local placenames such as Men Galen and Pinnath Gelin. If so, we find it regrettable that they should have overlooked the proper form appearing in the name of the river Calenhir but a stone's throw from their doorsteps." -Findegil
Calenhirost (S."Greenriver Fort"; "Galenhirost" in the local dialect) was the principal fortress of the eastern Pinnath Gelin. Rising from a hilltop overlooking the river Calenhir, the fort guarded the passage of the Men Galenas that road skirting the northern slopes of the Pinnath Gelin. The fort's commander was appointed by and subject to the Cáno of Anfalas and its modest garrison was supplied by the nearby agricultural village of Corgonin. The fortress was constructed in T.A. 822 as part of the royal consolidation of Anfalas under Siriondil I. The absence of any grave threats to law and order in the region, meant that Calenhirost's garrison was never enlarged; however it maintained itself throughout much of the Third Age, eventually becoming the seat of a local lord after T.A. 2050. The fief of Calenhirost encompassed all of the lands between the Lyghiril (known to local residents as Lhûghiril) and the Ram Galen, and retained much of this estate well into the Fourth Age.