Parks Minister Michelle O'Byrne released the Overland Track Sustainable Management Report yesterday, which showed the new system was delivering on environmental sustainability, social quality and economic management. In 2004 a booking system was introduced, along with a fee to walk the track and a limit of 60 departures a day.

Last year 5700 walked the Overland track, with more than 4600 making the 65km, six-day trek during the November to April booking season.

"Walker satisfaction is extremely high, with more than 90 per cent rating it as one of the best things they had done," Ms O'Byrne said.