Bois Du Gouffre

Bois du Gouffre is a small but ecologically significant woodland area in the Eure department of Normandy, France, forming part of the extensive state-owned Lyons forest (forêt domaniale de Lyons). Located within the commune of Touffreville, the site has held the status of a "réserve biologique dirigée" (directed biological reserve) since 1994, a protection category used within French state forests to safeguard areas of particular ecological value.

What is a directed biological reserve?

In France, biological reserves are established by the National Forestry Office (ONF – Office National des Forêts) within state forests identified as holding notable natural value. Unlike integral reserves, where all forestry operations are suspended, a directed reserve allows targeted human intervention, but with a purpose distinct from timber production: maintaining or restoring valuable habitats and the species that depend on them. Bois du Gouffre was granted this status by a decision dated 22 December 1994 and is classified under IUCN Category IV, denoting a protected area managed primarily through active intervention to conserve specific habitats or species.

How large is the reserve and where exactly is it located?

The reserve covers an area of 18.37 hectares. This is a modest size compared to the Lyons forest as a whole, one of the largest forest complexes in the Normandy region, but its designation as a distinct protected unit highlights the particular importance attached to this section of woodland. Its geographic coordinates place it at approximately 49.366°N, 1.460°E, in the northeastern part of Normandy, within the administrative territory of Touffreville. Management of the site falls under the ONF's Seine Nord territorial directorate, through the Rouen territorial agency.

Why was this part of the Lyons forest given protected status?

The creation of the reserve at Bois du Gouffre reflects a broader ONF policy of protecting sections of state forest with high ecological value, often including older stands of trees, deadwood left to decompose naturally, and habitats that take a long time to develop or cannot easily be recreated. Areas of this kind function as biodiversity reservoirs within the wider forest complex, supporting organisms associated with decaying wood, mature trees, and microhabitats that are less common in actively managed forest stands. Formal classification as a directed biological reserve also means that management actions on the site are documented and monitored by ONF services, with the founding decision governed by a public decree defining the reserve's boundaries and management rules.

What should visitors know before going?

Bois du Gouffre is not a developed tourist site with visitor infrastructure typical of major attractions; it is, above all, an area of ecological significance set within the wider landscape of the Lyons forest, a part of Normandy known regionally for its extensive, quiet walking routes and distinctive forest microclimate. Visitors to the surrounding area should keep in mind the rules that generally apply to protected woodland: staying on marked paths, leaving no trace, and respecting the quiet that allows local wildlife to be observed undisturbed.

Frequently asked questions

Where is Bois du Gouffre located? In the Eure department, within the commune of Touffreville, as part of the state-owned Lyons forest in Normandy.

What protection status does the area have? It is a directed biological reserve, established on 22 December 1994 and classified as an IUCN Category IV protected area.

How big is the reserve? It covers 18.37 hectares.

Who manages the site? The National Forestry Office (ONF), through its Seine Nord territorial directorate and the Rouen territorial agency.