Printed from: https://conservationhandbooks.com/fencing/gates-and-stiles/sheep-ramps-and-deer-leaps/
These should be included in fenced woodlands in remote locations that are not checked frequently. Any animals that get into the wood after heavy snowfall can then find their way out. If possible, make use of any natural outcrops within the fenced area, and position the fence up against the steep side of the outcrop...