The 2009 Great North Swim attracted 6,000 entries
Almost all the places on the Great North Swim have been snapped up, only six weeks since it opened for entries.
More than 7,000 people have signed up for the event at Lake Windermere in September. Only a limited number of charity places are now available.
Now in its third year, the swim in Cumbria raises money for charities and provides a boost to the local economy.
In 2009 an estimated 20,000 spectators watched 6,000 swimmers brave the one-mile, open-water course.
Among the participants were Health Secretary Andy Burnham, actor Steve McFadden, and Olympic swimming champions.