The main dangers in Vercors are in its topography. The risks of falling from cliffs must not be underestimated, and the swallow-holes are a hazard that exists everywhere in the plateau. Use extra caution if fog weather occurs, if for any reason the visibility is reduced, or if you walk away from designated path.
Some of the more scenic roads are literally dug in cliffs, in gorges, etc. These roads are narrow, with sharp bends. Exercise caution, especially in bad weather.
The Vercors plateau is at a higher altitude than neighbouring cities such as Grenoble. As such, areas in Vercors may receive snow while there is none in these surrounding cities and valleys. Main roads get snowploughed, but secondary roads might not; some secondary roads may be closed in winter, and some roads may be accessible only with tire chains. Snow tires are strongly advisable in winter, but most rental agencies do not provide them by default.
Because of the Karstic nature of this mountain, water is scarce. If hiking, always carry more water than you think you need.
If snowshoeing, especially in slopy or isolated places, carry a shovel and an ARVA apparatus, in case of an avalanche.
Although wolves have been noticed in the park, large mammals do not generally represent a risk. Do not feed them, even in the extraordinary case you are in the situation to do so. Vercors Regional Park is rabies free.
It is advised to lock cars and to avoid leaving money or valuables in them when going for a hike. Although infrequent, thefts can occur.
