ERIADOR
Eriador was the large region in the north-west of Middle-earth, defined between Lindon and the Blue Mountains to the west and Rhovanion and the Misty Mountains to the east. It was inhabited by all the Free peoples of Middle-earth, being the location of many of the most important events of the Second and Third Ages. By the end of the Third Age, its main inhabitants were Hobbits of the Shire and Men of the surrounding lands.
Eriador was a large, inhabited temperate region in the north-west of Middle-earth which experienced warm summers and increasingly cool winters. At its widest extent, it stretched for around 675 miles from east-to-west, around 690 miles from north-to-south, 740 miles from northeast-to-southwest and 750 miles from northwest-to-southeast. Drawing by J.R.R. Tolkien showing the Withywindle The most important rivers were: the Lune (Sindarin Lhûn) which flowed through the Blue Mountains to form the Gulf of Lune; the Brandywine (Sindarin Baranduin) which flowed out of Lake Evendim (Nenuial) to form the eastern-boundary of the Shire; and the Greyflood (Gwathló) which formed the southern-border of Eriador. Other rivers included: the Glanduin, which flowed out of Hollin (Eregion) and into the Greyflood above Tharbad, forming the Swanfleet (Nîn-in-Eilph) marsh; the Loudwater (Bruinen), passing Rivendell (Imladris) in the Ford of Bruinen; the Hoarwell (Mitheithel) which flowed out of the Ettenmoors and over which the Last Bridge passed; the Withywindle of the Old Forest; and The Water, Stock-brook, Shirebourn and Thistle Brook which all flowed into the Brandywine from in the Shire. Central Eriador was scattered with many groups of hills including the Tower Hills (Emyn Beraid), Hills of Evendim (Emyn Uial), Weather Hills as well as the Far Downs, White Downs, South Downs, North Downs and Barrow-downs (Tyrn Gorthad); Fonstad noted that the "longitudinal axes [of the hills] formed concentric rings". Despite large deforestation by the Númenóreans during the Second Age[10] some wooded areas remained, such as the Old Forest, Woody End, Bindbole Wood (sometimes seen as "Bindbale"), Chetwood around Bree-hill, the Trollshaws, and, largest of all, Eryn Vorn; Hollin was so named due to the large numbers of holly trees which grew there. Other geographic features included the Midgewater Marshes, Rushock Bog, and Overbourn Marshes. The East-West Road crossed Eriador from Rivendell in the east to the Grey Havens in the west whilst the Greenway ran south from Fornost, linking Arnor and Gondor; the Greenway and the East-West Road met at Bree. Key Elvish settlements included the Grey Havens, Ost-in-Edhil and Rivendell; for the Dúnedain there were Weathertop, Annúminas, and Fornost Erain, as well as the Númenórean ports of Tharbad and Lond Daer (earlier known as Vinyalondë).