There are several 'Blea' tarns amongst the Lakeland fells. This one, which lies between Thirlmere and Borrowdale, is probably the best from an anglers point of view and certainly holds trout of a higher average size than the rest of them - in fact the occasional very good fish is reported from time to time.
Unlike the majority of these waters which are more usually found in steep sided corries or at the head of a high valley, Blea Tarn sits on an open ridge with its waters open to the wind from all quarters. The bad news is that this ridge must rank as the boggiest square mile of Cumbria. Nor is it an easy place to find your way off in the mist.
Fish the tarn all round and expect the trout that do come to do so quickly and unannounced.