The Loe, also known as Loe Pool, is the largest natural freshwater lake in Cornwall, United Kingdom. The earliest recorded appearance of this simple name form was in 1337, when it was called "La Loo", but is mentioned as 'the lake' in 1302; Situated between Porthleven and Gunwalloe and downstream of Helston, it is separated from Mount's Bay by the shingle bank of Loe Bar. Both the Loe and Loe Bar are situated within the Penrose Estate, which is administered by the National Trust, and are designated as a Site of Special Scientific Interest by Natural England. It is within the Cornwall Area of Outstanding Natural Beauty and is considered a classic Geological Conservation Review Site. The South West Coast Path, which follows the coast of south-west England from Somerset to Dorset passes over Loe Bar.

Penrose is a house and National Trust estate amounting to 1536 acres, east of Porthleven and in the civil parish of Sithney, Cornwall, England. The estate includes Loe Pool and Loe Bar which was given into the ownership of the National Trust in 1974 by Lt. Cdr. J. P. Rogers, and stretches along the coast to Gunwalloe. The estate was owned by the Penrose family for several hundred years before 1771 when it was bought for £11,000 by the Rogers family, whose descendants still reside in Penrose House.