Councils in England will be banned from charging challengers to take part in weekend fun operates under regulations being proposed by the government.
Free events, organized by the Parkrun group to encourage fitness, attract thousands of athletes on to 5km( 3m) courses in parks across the country.
A parish assembly near Bristol last year proposed charging entrants 1 each, citing the cost of upkeep of tracks.
Communities Secretary Sajid Javid is to consult on the proposed legislation.
According to the Times, project proposals would make it illegal for local authorities to charge Parkrun or junior Parkrun, which operates 2km races in the case of children, for the use of a public park.