page_title: River Derg
hierarchical_section_title: River Derg
caption_attribution_description: English: The Ardstraw bridge viewed from downstream. That's the River Derg which flows under this bridge.
context_page_description: The River Derg is a small river in Ireland. The river has its source in the Lough Derg and it flows to east through Castlederg and join to the River Strule to form the River Mourne. The upper reaches of the catchment are characterised by peatland, while
  the lower reaches flow predominantly through farmland.
  The River Derg's length is 28 miles
  The River Derg is known for its salmon, grilse and sea trout.
context_section_description: The River Derg is a small river in Ireland. The river has its source in the Lough Derg and it flows to east through Castlederg and join to the River Strule to form the River Mourne. The upper reaches of the catchment are characterised by peatland, while
  the lower reaches flow predominantly through farmland.
  The River Derg's length is 28 miles (45 km)
  The River Derg is known for its salmon, grilse and sea trout.
caption: River Derg and the Ardstraw Bridge
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