There's been more problems for the Great Walks booking system.

The Department of Conservation website crashed this morning - when 11,000 people tried to access it this morning.

By 11.15am, there were about 2800 bookings for the Milford Track and 400 for the Lake Waikaremoana.

Federated Mountain Clubs Chief Executive, Megan Dimozantos says so many people will have missed out.

"The most disappointing thing is that after last year's debacle, we would have hoped this would have been sorted out by this year."

LISTEN ABOVE