- St Mary's Loch
Infobox lake
lake_name = St Mary's Loch
image_lake =
caption_lake =
image_bathymetry =
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location = Borders,Scotland
coords = coord|55|29|40|N|3|11|10|W|type:waterbody_region:GB|display=inline,title
type = freshwaterloch
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outflow =
catchment =
basin_countries = United Kingdom
length = 5 km
width = 1 km
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cities =St Mary's Loch is the largest natural
loch in the Scottish Borders Region and is situated about 72 km south ofEdinburgh on theA708 road betweenSelkirk andMoffat in the valley of the Yarrow. It is 5 km long and 1 km wide. Local legend has it that the loch has no bottom and is reputed to be the coldest loch in Scotland. Immediately upstream from St Mary's Loch is The Loch of the Lowes, a smaller lake. Between the two is situated Tibbie Shiels Inn. The Southern Upland Way crosses between the two lochs.The loch was created by
glacial action during the lastice age .A few miles further on the road towards Moffat The Grey Mare's Tail, the 5th highest waterfall in the UK, can be seen to the north of the road.
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