Twenty-one thousand people lined up for the start of the 2009 Great South Run.
On your marks - competitors completed more than 210,000 miles (338,000km) between them.
Many runners were raising money for their chosen charity.
Competitors gathered in the "charity village" before the start.
Runners gathered in Southsea Castle Field ahead of the starting gun.
Millions of pounds are raised for a variety of charities each year.
The race was started by Portsmouth and England goalkeeper David James.
Competitors set off in waves on what is believed to be the world's flattest 10-mile (16km) course.
Some competitors swapped their running vests for more unusual costumes.
Celebrities taking part in the race included EastEnders star Jake Wood (Max Branning).
Wheelchair athletes also took part in the race.
The race starts at Southsea before heading into Old Portsmouth and through the city centre.
A sunny, breezy day made for a great atmosphere for this year's Great South Run.
Record numbers of onlookers lined the route to cheer on the runners.
Some runners had more of a challenge ahead than others.
Twenty-one thousand pairs of feet pounding the streets of Portsmouth.
The race route passes many of Portsmouth's most famous landmarks.
The elite women's race was won by Ines Monteiro from Portugal 26 seconds ahead of fellow countrywoman Ana Dulce Felix.
The elite men's race was won by Great Britain's Mo Farah who crossed the line after a thrilling sprint finish ahead of Stephen Mokoka (South Africa) and Luke Kibet (Kenya).
This was the 26-year-old Londoner's first serious race over the distance on the flat and fast Portsmouth course.