How deep is Blea Water?

Blea Water is about 63 metres deep and is generally recognised as the deepest tarn in the Lake District. It lies in a glacial corrie beneath High Street at roughly 480 metres above sea level.

How difficult is the walk to Blea Water from Mardale Head?

The direct approach climbs roughly 230 metres to the tarn, but it is still steep, rocky mountain terrain. A high-level circuit over surrounding summits is much longer and involves far more ascent. Use an up-to-date map and check weather and daylight.

Can you swim in Blea Water, and is Mardale Head open?

Do not assume swimming is permitted: check current landowner guidance and remember the water is very cold, deep and remote. United Utilities works may also restrict Mardale Head parking or access, so check its Blea Water project updates before travelling.

Think the Lakes Are Special? Meet the Tarns

Blea Water: The Deepest Tarn and the Climb It Demands

Blea Water is a glacial corrie tarn beneath High Street, around 63 metres deep and about 480 metres above sea level. A direct visit from Mardale Head is a serious mountain walk, but it does not demand 550 metres of ascent.

8 August 20266 min read