Dunglass Island is an uninhabited island in the River Conon

River Conon

The River Conon is a river in the Highlands of Scotland. It begins at Loch Luichart, and flows in a south-easterly direction to be joined by the River Meig at Scatwell before passing through Loch Achonachie...

 south-west of the village of Conon Bridge

Conon Bridge

Conon Bridge is a small village in the Highland region of Scotland. The current Gaelic name is likely a neologism: the bridge wasn't built until the early 19th century and some early gravestones show the name sgudal or scuddle...

 in the Highlands

Scottish Highlands

The Highlands is an historic region of Scotland. The area is sometimes referred to as the "Scottish Highlands". It was culturally distinguishable from the Lowlands from the later Middle Ages into the modern period, when Lowland Scots replaced Scottish Gaelic throughout most of the Lowlands...

 of Scotland. At approximately 40 hectares (98.8 acre) in extent, it is one of Scotland's largest freshwater islands.

The island, which contains the site of an Iron Age

Iron Age

The Iron Age is the archaeological period generally occurring after the Bronze Age, marked by the prevalent use of iron. The early period of the age is characterized by the widespread use of iron or steel. The adoption of such material coincided with other changes in society, including differing...

 fort, can be reached by a wooden road bridge accessed by a track leading from the farm of Dunglass on the west side of the river or across a footbridge that spans a weir at the south-west extremity of the island.

Following a substantial flood in 1892, Nairne described the island as follows:

Port of Dunglass farm, about 100 acres, consists of Dunglass Island in the river and the embankment here broke, with the result that over twenty acres was covered with a thick layer of gravel that renders it unfit for further tillage. The Conon channel used to be the larger of the two but a gravel bank was thrown across above the Islands, and the greatest part of the river, for a time flowed through the Dunglass channel. The diversion of the river caused enormous damage to salmon ova, as the breeding banks were left dry, and something like a million ova practically became useless.

In 2004, a £38,000 biodiversity project involving Scottish Natural Heritage

Scottish Natural Heritage

Scottish Natural Heritage is a Scottish public body. It is responsible for Scotland's natural heritage, especially its natural, genetic and scenic diversity. It advises the Scottish Government and acts as a government agent in the delivery of conservation designations, i.e...

, Conon District Salmon Fishery Board, Brahan Estates, the Highland Council and Ross and Cromarty Enterprise was undertaken. Dense plantation woodland was removed and 400 tonnes (393.7 LT) of cobblestones repositioned to aid salmon

Atlantic salmon

The Atlantic salmon is a species of fish in the family Salmonidae, which is found in the northern Atlantic Ocean and in rivers that flow into the north Atlantic and the north Pacific....

 spawning, which also benefited other river species such as lamprey

Lamprey

Lampreys are a family of jawless fish, whose adults are characterized by a toothed, funnel-like sucking mouth. Translated from an admixture of Latin and Greek, lamprey means stone lickers...

s. This work restored an alder-lined channel through the island, which had become "defunct".