The waterfall is one of the highest in the United Kingdom, dropping 200 feet over a hanging valley.
Loch Skeen, the water source for the falls, sits at an elevation of 300 meters above sea level.
The reserve is a sanctuary for the rare vendace, Britain’s rarest freshwater fish, found in Loch Skeen.
The site provides a habitat for the nationally rare upland flora such as the alpine saxifrage.
The steep slopes of the ravine are home to a longstanding colony of feral goats, likely descendants of abandoned farm livestock.
The landscape is a prime example of a 'hanging valley,' where a smaller glacier-carved valley meets a deeper main valley.
The reserve is part of the Southern Uplands, a region known for some of Scotland's least populated and most rugged terrain.
Grey Mare's Tail Nature Reserve features a 60-meter hanging valley waterfall created by glacial erosion. The site is situated within the Moffat Hills and is managed by the National Trust for Scotland. It hosts the elevated Loch Skeen, which serves as the primary water source for the waterfall. The terrain is characterized by steep, rugged landscapes that support rare upland plant species. Hiking trails follow the Tail Burn, connecting the lower car park to the loch above. The area is part of a designated Site of Special Scientific Interest due to its unique geological and biological features. Visitors encounter diverse wildlife, including feral goats and peregrine falcons. The reserve landscape was shaped significantly during the last glacial period, resulting in the deep U-shaped valley visible today.
The wooden footbridge near the base of the waterfall, which provides a direct line of sight to the cascade.
Wear sturdy, waterproof hiking boots with high ankle support as the terrain is steep, rocky, and often muddy.
Bring binoculars to spot peregrine falcons and feral goats on the higher ridge lines.
Check local weather reports specifically for the Moffat Hills, as conditions can change rapidly compared to the lower valley.
Attempting the steep path to the top of the waterfall in heavy rain or high winds, which makes the terrain dangerously slippery.
The site is open year-round, though access to the higher paths around Loch Skeen may be restricted during severe winter weather.
Keep dogs on a lead at all times to protect ground-nesting birds and livestock; follow the Scottish Outdoor Access Code.
