The Giro began with a team time trial in Lido, a barrier island in the city of Venice.
The starting order of the teams was decided by a random draw.
Team Columbia–High Road, the first team to take the course, won the stage, giving their star sprinter Mark Cavendish the first pink jersey as leader of the race.
Cavendish was defeated in a sprint finish the following day by Italian Alessandro Petacchi, who was riding for the LPR Brakes–Farnese Vini team.
Petacchi became the next wearer of the pink jersey, after he won the Stage 3 sprint into Valdobbiadene.
Cavendish went on to win three mass-start stages, but Team Columbia–High Road's success was not limited to Cavendish's victories nor the team time trial, as Edvald Boasson Hagen and Kanstantsin Sivtsov also took stage wins.

The first two high mountain stages of the Giro revealed the men who would battle for the overall race title.
Danilo Di Luca of LPR Brakes–Farnese Vini took the win in Stage 4, and put himself just 2 seconds off the pink jersey.
The next day, he claimed the jersey, when he was second to stage winner Denis Menchov at Alpe di Siusi as an elite group of favorites emerged including Menchov, Di Luca, and others who had performed well on the climb and were in high places in the overall standings.

Menchov was fifth after Alpe di Siusi, but rose to second before stage 12, the very long and hilly individual time trial in Cinque Terre.
There, he claimed a convincing victory; only Levi Leipheimer finished within a minute of Menchov's winning time.
Di Luca was nearly two minutes slower than him, finished sixth on the stage, and fell to second overall, with Menchov assuming the race lead.
Di Luca tried repeatedly to shed Menchov during the remaining mountain stages to make up the time difference, which was never more than a minute.
The two riders were involved in sprints for time bonuses at the finish line in stages 16 and 17, as well as an intermediate sprint in stage 20.
Menchov was consistently quicker than Di Luca in these sprints.
With his superior time-trial skills providing the difference in the final stage, the Russian was able to emerge as Giro champion, despite a dramatic fall in the final kilometre before the finish line.

Stefano Garzelli was the winner of the mountains classification, gaining points for consistent high placings on the summit stage finishes, as well as a brief breakaway on the mountainous stage 10.
The points classification was won by Di Luca, after he finished in the top ten in eight of the road stages.
The youth classification was won by Kevin Seeldraeyers, who remained consistent after Thomas Lövkvist lost nearly 25 minutes on stage 16.
Lövkvist had, for one day earlier in the race, led not just the youth but also the general classification.

Controversy arose during the ten-lap Milan criterium of the ninth stage, when the riders staged a protest over what they viewed as unsafe riding conditions in that stage and those that preceded it.
The most visible cause for the protest was Rabobank rider Pedro Horrillo's accident during the eighth stage; Horrillo sustained numerous fractures and head injuries after tumbling over a barricade on the roadside while descending the Culmine di San Pietro.
Horrillo fell more than 60 m (200 ft), and nearly died as a result of his injuries.
After spending five weeks in hospitals in both Italy and his native Spain, Horrillo eventually recovered, though the day on the Culmine di San Pietro was his last as a professional cyclist, as he retired before the 2010 season began.

The protest at first only involved the criterium being neutralized – that is, the race director agreed that each rider would receive the same finishing time as the stage winner regardless of when they actually crossed the line.
After the riders rode a lap of the course, they decided instead not to contest the stage at all, riding the first six circuits 20 km/h (12 mph) slower than previous stages.
After four laps, they stopped altogether as race leader Di Luca addressed the unhappy crowd to explain their actions.
The times for the stage did
The Giro began with a team time trial in Lido, a barrier island in the city of Venice. The starting order of the teams was decided by a random draw. Team Columbia–High Road, the first team to take the course, won the stage, giving their star sprinter Mark Cavendish the first pink jersey as leader of the race. Cavendish was defeated in a sprint finish the following day by Italian Alessandro Petacchi, who was riding for the LPR Brakes–Farnese Vini team. Petacchi became the next wearer of the pink jersey, after he won the Stage 3 sprint into Valdobbiadene. Cavendish went on to win three mass-start stages, but Team Columbia–High Road's success was not limited to Cavendish's victories nor the team time trial, as Edvald Boasson Hagen and Kanstantsin Sivtsov also took stage wins.
The first two high mountain stages of the Giro revealed the men who would battle for the overall race title. Danilo Di Luca of LPR Brakes–Farnese Vini took the win in Stage 4, and put himself just 2 seconds off the pink jersey. The next day, he claimed the jersey, when he was second to stage winner Denis Menchov at Alpe di Siusi as an elite group of favorites emerged including Menchov, Di Luca, and others who had performed well on the climb and were in high places in the overall standings.
Menchov was fifth after Alpe di Siusi, but rose to second before stage 12, the very long and hilly individual time trial in Cinque Terre. There, he claimed a convincing victory; only Levi Leipheimer finished within a minute of Menchov's winning time. Di Luca was nearly two minutes slower than him, finished sixth on the stage, and fell to second overall, with Menchov assuming the race lead. Di Luca tried repeatedly to shed Menchov during the remaining mountain stages to make up the time difference, which was never more than a minute. The two riders were involved in sprints for time bonuses at the finish line in stages 16 and 17, as well as an intermediate sprint in stage 20. Menchov was consistently quicker than Di Luca in these sprints. With his superior time-trial skills providing the difference in the final stage, the Russian was able to emerge as Giro champion, despite a dramatic fall in the final kilometre before the finish line.
Stefano Garzelli was the winner of the mountains classification, gaining points for consistent high placings on the summit stage finishes, as well as a brief breakaway on the mountainous stage 10. The points classification was won by Di Luca, after he finished in the top ten in eight of the road stages. The youth classification was won by Kevin Seeldraeyers, who remained consistent after Thomas Lövkvist lost nearly 25 minutes on stage 16. Lövkvist had, for one day earlier in the race, led not just the youth but also the general classification.
Controversy arose during the ten-lap Milan criterium of the ninth stage, when the riders staged a protest over what they viewed as unsafe riding conditions in that stage and those that preceded it. The most visible cause for the protest was Rabobank rider Pedro Horrillo's accident during the eighth stage; Horrillo sustained numerous fractures and head injuries after tumbling over a barricade on the roadside while descending the Culmine di San Pietro. Horrillo fell more than 60 m (200 ft), and nearly died as a result of his injuries. After spending five weeks in hospitals in both Italy and his native Spain, Horrillo eventually recovered, though the day on the Culmine di San Pietro was his last as a professional cyclist, as he retired before the 2010 season began.
The protest at first only involved the criterium being neutralized – that is, the race director agreed that each rider would receive the same finishing time as the stage winner regardless of when they actually crossed the line. After the riders rode a lap of the course, they decided instead not to contest the stage at all, riding the first six circuits 20 km/h (12 mph) slower than previous stages. After four laps, they stopped altogether as race leader Di Luca addressed the unhappy crowd to explain their actions. The times for the stage did
2009 Giro d'Italia