Ardoch Roman Fort(Alavna Veniconvm), is an archaeological site just outside the village of Braco in Perthshire, Scotland, about 7 miles south of Crieff. At Ardoch are the remains of a Roman fort and several marching camps which included a signal tower. Part of the Roman Gask Ridge, it is said to be one of the most complete Roman camps in Britain, and is one of the best-preserved series of Roman military earthworks in the whole Empire.
In 1726 Alexander Gordon claimed that at Ardoch Roman Fort a subterranean passage was said to run from the fort, under the River Tay to the fort or 'Keir' on Grinnin Hill. This tunnel was said to contain a great deal of treasure.
Ardoch Roman Fort is part of the Ardoch estate, and is in private ownership, although access is allowed at all reasonable times. To the north, the earthwork remains of two Roman marching camps, known as Blackhill Camp, are in the care of Historic Scotland.