Loch Lomond National Nature Reserve (NNR) (Scottish Gaelic: Tèarmann Nàdair Nàiseanta Loch Laomainn) encompasses 430 hectares of land at the southeastern part of Loch Lomond in the council areas of Stirling and West Dunbartonshire, in Scotland. It covers the islands of Inchcailloch, Clairinsh, Torrinch, Creinch and Aber Isle, alongside areas of woodland and wetlands to either side of the mouth of the Endrick Water. NatureScot owns two parts of the reserve - the island of Inchcailloch and part of Gartfairn Wood - and the rest is privately owned. The reserve is managed by a partnership consisting of NatureScot, the RSPB Scotland and the Loch Lomond and The Trossachs National Park, along with the owners and tenants of the land under agreements. Within this framework NatureScot directly manage