Grey Mare's Tail

Grey Mare's Tail is a tall Scottish waterfall in the hills near Moffat, in Dumfries and Galloway. The burn drops roughly 60 metres into a glacial valley, and the whole area is a nature reserve looked after by the National Trust for Scotland.

What will you see?

The fall itself is the headline: it ranks as the fifth highest in Britain. Tail Burn pours down a steep rock face into a narrow ravine, visible from the car park below and from the path. Higher up, the valley opens out onto heather moorland and the rounded hills of the Southern Uplands. The route ends at Loch Skeen, sitting above 500 m, described as the highest natural loch in the Southern Uplands. It holds vendace, a rare freshwater fish that survives from the Ice Age.

Near the start, a ranger trailer hands out leaflets and shows a live camera feed from a peregrine falcon nest.

What is the walk like?

The trail leaves from the car park and climbs beside the falls. It then follows the burn to Hogg's Well and continues to Loch Skeen. Depending on the guide, the round trip measures 2.5 to 2.8 miles (about 4 to 4.5 km). The path is clear but steep in places, with steps cut into the hillside, and the surface can be rough. Walking boots with good ankle support are a sensible choice. There is a drop beside the path in places, so keep children and dogs close.

If you only want a view of the waterfall, a short climb from the car park is enough. Reaching the loch takes longer; plan a half day for the full loop including stops.

How do you get there and where do you park?

The falls lie beside the A708 between Moffat and Selkirk, several miles from Moffat. A pay car park serves the reserve. Driving is the easiest option, as public transport in the area is limited. Moffat works well as a base for lodging and meals.

When should you visit?

The waterfall looks best after rain and during spring snowmelt, when the flow is strongest. Summer gives the easiest walking, but hill weather turns quickly, so pack a waterproof layer. In winter the path can be icy and slippery.

Frequently asked questions

How high is Grey Mare's Tail? About 60 metres, making it one of the highest waterfalls in Britain.

Is there an entry fee? Walking the trail is free, but parking is charged.

How long does the walk to Loch Skeen take? The route is around 2.5 to 2.8 miles. Allow a few hours for the loop with time to look around.

Can I bring my dog? Yes, the route is dog-friendly, but keep your dog on a lead because of the steep sections and drops.