The Open Spaces Society held a Spirit of Kinder event on Saturday to celebrate the 82nd anniversary of the famous mass trespass.
Speaking at Sheffield Town Hall, general secretary Kate Ashbrook said: “We must reignite the campaigning zeal of the Kinder trespassers. Times are tough for countryside campaigners, but the spirit of Kinder will carry us through.
“The governments in England and Wales are attacking our green spaces, making it almost impossible for local people to register them as town or village greens to secure their rights to enjoy them.
“The cuts in local authority funding and the obsession with development mean that budgets for maintaining, creating and recording public paths have been slashed.
“This year we celebrate the tenth anniversary of the right to roam on open country.
“The Kinder trespassers, five of whom, scandalously, were jailed, showed what can be achieved with determination and courage. We must never forget their legacy as we face the battles of today.”