Footbridge over the river Riccal
|Origin||Confluence of Bonfield Gill and Bogmire Gill near Helmsley
|Length||18.36 kilometres (11.41 mi)|
|Source elevation||130 metres (430 ft)|
|Mouth elevation||24 metres (79 ft)|
|Basin area||57.6 square kilometres (22.2 sq mi)|
The River Riccal is a river of North Yorkshire, England, lying within the North Yorks Moors National Park. It is a tributary of the River Rye, which in turn is a tributary of the River Derwent. The name originates in the fourteenth century as Ricolvegraines means Rye Calf, where Calf is a small island near a larger one. This describes the way the river, and those nearby, form islands as their nature changes due to meandering.
Some writers have misspelled the river Riccall, possibly in confusion with an unconnected village in North Yorkshire. The Riccal name was also the name of a Rural District before 1935. The river is under the management of the Rye Internal Drainage Board, a member of the Vale of Pickering IDBs.
Cowhouse Beck and Bonfield Gill meet at the end of Lund Ridge at Coning's Birks in Hag Wood to form the Riccal. The river meanders south and south-east through woodland, passing the villages of Carlton and Pockley. It emerges into open countryside to the east of Helmsley and passes under the A170 and continues south towards Harome. Here it turns east south-east to join the River Rye at High Waterholmes in Ryedale just a half mile from the confluence of the River Rye and River Dove.
The typical river level range at the Nunnington Environment Agency measuring station is between 0.16 metres (0.52 ft) and 0.44 metres (1.4 ft). The Tabular Hills Walk crosses the river above Carlton.
The river valley, or Dale, is part of the range of upland called the Tabular Hills on the southern boundary of the North Yorks Moors. This describes the flat or table top appearance of the summits of these ridge tops. The primary geology is limestone and calcareous sandstone with dale itself being the result of glacial run-offs.
- Ordnance Survey Open Viewer 
- Google Earth
- National Environment Research Council - Centre for Ecology and Hydrology 
- Environment Agency 
- "Name". Retrieved 23 August 2011.
- Herbert Read, 'Exile's Lament', in Herbert Read, Collected Poems (London: Faber and Faber, 1966)
- "Management". Retrieved 23 August 2011.
- "River levels". Retrieved 23 August 2011.
- "Leisure". Retrieved 23 August 2011.
- "Geology". Retrieved 23 August 2011.
- "History". Retrieved 23 August 2011.