Keswick mountain festival, Lake District
This 3.6km lake swim has a fun beginning, where youâll be ferried to the start point at High Brandlehow aboard a wooden Keswick launch. Follow the course past secluded Derwent Isle to the northern end of the lake, dwarfed by the fells of Cat Bells and Skiddaw. Shorter swims are also available. The option to dance away the evening on the lakeshore to live bands is included in your swim ticket. A host of other sporting challenges take place during the festival, including trail runs, hikes and triathlons. Pitch up at the festival campsite close to the lake.