Marsland Valley is a nature reserve situated in two large valleys which straddle the northern end of the Devon-Cornwall border. It is a designated nature reserve jointly managed by the Devon Wildlife Trust and the Cornwall Wildlife Trust. The reserve is a Special Area of Conservation, as well as forming part of two Sites of Special Scientific Interest; Steeple Point to Marsland Mouth on the Cornish side and Marsland to Clovelly Coast in Devon.
The valley is situated near the villages of Gooseham and Morwenstow, approximately ten miles north of the Cornish Atlantic Coast resort of Bude. The watercourse along the valley, which discharges directly into the sea, at Marsland Mouth, is called Marsland Water. The land was donated by the late Christopher Cadbury (former President of the Royal Society for Nature Conservation 1962-1986) to the county Trusts.
On the south-facing wooded slope towards Gooseham Mill the trees are coppiced to create clearings, and vegetation thinned to keep it low so that flowers and insects can flourish.
- Wild Cornwall; by David Chapman (Alison Hodge Books)
- Cornwall Wildlife Trust - Marsland Valley page
- Devon Wildlife Trust - Marsland Valley page
- "Steeple Point to Marsland Mouth" (PDF). Natural England. 1987. Retrieved 29 November 2011.
- "Marsland to Clovelly Coast" (PDF). Natural England. 1986. Retrieved 29 November 2011.
- Ordnance Survey: Landranger map sheet 190 Bude & Clovelly ISBN 978-0-319-23145-6
- Moths seen at Marsland