The Flashes is a 115.1-hectare (284-acre) Local Nature Reserve west of Godalming in Surrey.

It is owned by the National Trust and managed by Waverley Borough Council.

[1][2] It is part of Thursley, Hankley and Frensham Commons Sites of Special Scientific Interest,[3] Thursley, Ash, Pirbright & Chobham Special Area of Conservation[4] and Thursley, Hankley & Frensham Commons Special Protection Area,[5] Most of The Flashes is a river valley mire with purple moor-grass, cross-leaved heath, common cottongrass, heather, rushes and sphagnum mosses.

Part of the site is covered with peat.

[1] There is access from Sandy Lane.