The A961 is a single-carriageway road on the eastern side of Scapa Flow in the Orkney Islands, connecting the town of Kirkwall on the Orkney Mainland to Burwick at the southern end of South Ronaldsay.
The road links four islands to the mainland, crossing four causeways known collectively as the Churchill Barriers, which were built during World War II as naval defences to protect the natural harbour of Scapa Flow after a successful attack by a German U-boat.
Proceeding southwards from Kirkwall, the road travels south to St Mary's, from where it crosses Kirk Sound on the first Churchill Barrier to the island of Lamb Holm, site of the Italian Chapel built by the Italian prisoners of war who built the barriers.
The second barrier carries the road to the island of Glims Holm, from where the third barrier connects to the larger island of Burray. From the southern shore of Burray, the fourth Churchill barrier (which has accumulated large sand dunes and no longer looks a barrier) passes onto the much larger South Ronaldsay, the southernmost island of Orkney. The road turns south-west to the village of St Margaret's Hope, from where it continues south to Burwick, near the southernmost point of Orkney.
- Ordnance Survey. "View: Sheet 6, Orkney Islands (Kirkwall) - Ordnance Survey One-inch to the mile maps of Great Britain, Seventh Series, 1952-1961". National Library of Scotland. National Library of Scotland. Retrieved 2016-01-23.
- Ordnance Survey. "View: Sheet 7, Pentland Firth - Ordnance Survey One-inch to the mile maps of Great Britain, Seventh Series, 1952-1961". National Library of Scotland. National Library of Scotland. Retrieved 2016-01-23.
- Cormack, Alastair; Cormack, Anne (1992). Bolsters, blocks, barriers: the story of the building of the Churchill barriers in Orkney. Kirkwall: Orkney View. ISBN 1870460065.
AA Road Atlas of Great Britain, 2006
"A961: Kirkwall - Burwick (South Ronaldsay)". The Society for All British Road Enthusiasts. Retrieved 2007-10-29.
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