The valley stretches from the Kirkwood prison grounds in the west to Colchester and Kinkelbos in the southeast.
It is characterized by high-intensity agricultural activities (in particular the production of citrus fruits) and a well-developed irrigation system.
In addition to citrus cultivation, various tourist attractions, bed and breakfast facilities, packing sheds and game-related tourist facilities are present throughout the valley.
[1] The Sundays River Valley irrigation scheme was started in the early 1920s, targeting British settlers on small holdings (10 morgen in size) along the banks of the Sundays River.
A large dam was constructed on the Sundays River (Lake Mentz) to supply the area with water for irrigation, and a canal system was put in place to supply water to farms from Kirkwood, at the upper end of the valley, to Addo at the lower end.