Calthorpe Broad is an isolated broad within The Broads National Park, three miles north east of Stalham

Stalham

Stalham is a market town on the River Ant in the English county of Norfolk, in East Anglia. It covers an area of and had a population of 2,951 in 1,333 households as of the 2001 census. It lies within the Norfolk Broads, about north-east of Norwich on the A149 road.For the purposes of local...

, Norfolk, England.

English Nature

English Nature

English Nature was the United Kingdom government agency that promoted the conservation of wildlife, geology and wild places throughout England between 1990 and 2006...

 manages it as a National Nature Reserve

National Nature Reserve

For details of National nature reserves in the United Kingdom see:*National Nature Reserves in England*National Nature Reserves in Northern Ireland*National Nature Reserves in Scotland*National Nature Reserves in Wales...

, one of over 200 NNRs. It is only 44 hectares, but of interest because of its plant life. It is detached from the main network of broads and rivers, but is part of the River Thurne

River Thurne

The River Thurne is a river in Norfolk, England in The Broads. Just six miles long it rises two miles from the coast near Martham Broad and is navigable from West Somerton. It flows southwest and is linked by Candle Dyke and Heigham Sound to both Horsey Mere and Hickling Broad...

catchment area.