Most stores along the route had boarded up there windows before the protests – with the exception of sausage stands and other fast food restaurants.
Police helicopters hovered overhead as demonstrators marched behind a truck blowing out soap bubbles and carrying a rock band that played anti-globalisation songs like “Block G8”.
A 12km security fence has been built around the resort where for the June 6-8 talks about climate change, aid and financial markets.
Eager to avert the violence that has accompanied past G8 summits, German leaders have issued pleas for peaceful demonstrations.
In 2001, a demonstrator was shot by police at a G8 meeting in Genoa. Since then, G8 summits have been surrounded by heavy security.
About 16,000 police officers are on duty in the week leading up to the meeting, Germany‘s biggest security operation since after World War II.
Protesters are expected to block roads leading to the leaders’ summit.
They may also disrupt the arrival of delegates with their plan to blockade the nearby military airport at Rostock-Laage early next week.
Trouble may also flare after authorities refused permission for a demonstration by the far-right National Democrats (NPD) to go ahead in nearby Schwerin.
Organisers of the main anti-G8 demonstrations expressed concern that protesters who had planned to take part in the Schwerin rally might descend on Rostock instead.