Wimbleball Lake is a reservoir located within Exmoor National Park, near Brompton Regis, Dulverton, Somerset (postcode TA22 9NU). Built in 1978, it covers approximately 370 acres of water within a 530-acre site, stretches around 4 kilometres in length, and reaches a maximum depth of 50 metres. The perimeter circuit is approximately 9 miles. At full capacity the reservoir holds 21,320 megalitres.

The lake is managed by South West Lakes Trust through an activity centre on site. Paddlers with their own equipment can self-launch kayaks, canoes, and stand-up paddleboards by booking and paying a self-launch fee (currently £12) through the activity centre online. Proof of insurance is required for self-launching. Annual memberships are also available, granting unlimited self-launch access across five South West Lakes Trust activity centres. Equipment hire — including kayaks, canoes, and stand-up paddleboards — is available for those without their own kit, along with taster sessions and guided instruction for beginners.

The lake offers flat, sheltered water, making it well suited to learning and recreational paddling. The surrounding landscape consists of rolling moorland hills characteristic of Exmoor, with numerous bays and inlets to explore around the shoreline. Wildlife in the area includes red deer and brown long-eared bats, the latter often visible at dusk around the campsite.

Swimming in the lake is not permitted for general visitors, though restricted access exists for registered athletes and occasional open-water swimming events are organised separately. Dogs are welcome on site but must be kept on leads and out of the water; they are permitted aboard kayaks and canoes provided they do not enter the lake.

On-site facilities include a café, hot showers, toilets, a laundry room, a shop, and a campsite open from March to late October. Car parking is available at £2.00 for one hour, £3.00 for three hours, or £6.00 for a full day. The activity centre also offers sailing, windsurfing, and eFoiling, so the water can be shared with other users, particularly during summer months and organised events.