The Lent Bumps 2003 were a series of rowing races held at Cambridge University from Tuesday 25 February 2003 until Saturday 1 March 2003. The event was run as a bumps race and has been held annually in late-February or early March since 1887. See Lent Bumps for the format of the races. In 2003, a total of 121 crews took part (69 men's crews and 52 women's crews), with nearly 1100 participants.
Caius men rowed-over in 1st position, retaining the headship.
Caius women bumped Lady Margaret, Jesus and Emmanuel to take their first ever women's headship of the Lent Bumps.
Caius also held both the double headship in the May Bumps 2002, meaning that all four headships were held by the same club simultaneously – the first time this has ever happened in bumps history.
The highest men's 2nd VIII for the 4th consecutive year was Caius II.
The highest women's 2nd VIII for the 3rd consecutive year was Jesus II.
| width=150 | Preceding year | width=150 | Current year | width=150 | Following year |
|---|---|---|---|---|---|
| Lent Bumps 2003 | Lent Bumps 2004 | ||||
| May Bumps 2004 | |||||
Below are the bumps charts for the 1st and 2nd divisions, with the men's event on the left and women's event on the right. The bumps chart represents the progress of every crew over all four days of the racing. To follow the progress of any particular crew, simply find the crew's name on the left side of the chart and follow the line to the end-of-the-week finishing position on the right of the chart.
| width=35 | Pos | width=125 | Crew | width=90 | Men's Bumps Chart | width=125 | Crew | width=35 | Pos | width=125 | Crew | width=90 | Women's Bumps Chart | width=125 | Crew | width=35 | Pos |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 1 | |||||||||||||||
| 2 | 2 | 2 | |||||||||||||||
| 3 | 3 | 3 | |||||||||||||||
| 4 | 4 | 4 | |||||||||||||||
| 5 | 5 | 5 | |||||||||||||||
| 6 | 6 | 6 | |||||||||||||||
| 7 | 7 | 7 | |||||||||||||||
| 8 | 8 | 8 | |||||||||||||||
| 9 | 9 | 9 | |||||||||||||||
| 10 | 10 | 10 | |||||||||||||||
| 11 | 11 | 11 | |||||||||||||||
| 12 | 12 | 12 | |||||||||||||||
| 13 | 13 | 13 | |||||||||||||||
| 14 | Caius II | Caius II | 14 | 14 | |||||||||||||
| 15 | 15 | 15 | |||||||||||||||
| 16 | 16 | 16 | |||||||||||||||
| 17 | 17 | 17 | |||||||||||||||
| 18 | 18 | 18 | |||||||||||||||
| 19 | Lady Margaret II | 19 | Jesus II | 19 | |||||||||||||
| 20 | 20 | Jesus II | 20 | ||||||||||||||
| 21 | Downing II | 21 | 21 | ||||||||||||||
| 22 | Lady Margaret II | 22 | 22 | ||||||||||||||
| 23 | 1st & 3rd Trinity II | 23 | Lady Margaret II | 23 | |||||||||||||
| 24 | Downing II | 24 | 24 | ||||||||||||||
| 25 | 1st & 3rd Trinity II | 25 | 25 | ||||||||||||||
| 26 | Jesus II | 26 | Emmanuel II | Lady Margaret II | 26 | ||||||||||||
| 27 | Christ's II | Jesus II | 27 | Emmanuel II | 27 | ||||||||||||
| 28 | Emmanuel II | 28 | 28 | ||||||||||||||
| 29 | Emmanuel II | 29 | New Hall II | 29 | |||||||||||||
| 30 | Queens' II | 30 | New Hall II | Newnham II | 30 | ||||||||||||
| 31 | Christ's II | 31 | 31 | ||||||||||||||
| 32 | Trinity Hall II | 32 | Newnham II | 32 | |||||||||||||
| 33 | Queens' II | Churchill II | 33 | 33 | |||||||||||||
| 34 | Churchill II | 34 | Queens' II | 34 |