| 2000 · 2000 24 Hours of Le Mans | DNF | 15 | LMP900 | Thomas Bscher Promotion | Thomas Bscher · Geoff Lees · Jean-Marc GounonThomas Bscher Geoff Lees Jean-Marc Gounon | BMW V12 LM | BMW S70 6.0 L V12 | 180 | Wikipedia contributors · CC BY-SA 4.0 |
| 1998 · 1998 24 Hours of Le Mans | DNF | 29 | LM-GT1 | Toyota Motorsport GmbH | Geoff Lees · Thierry Boutsen · Ralf KellenersGeoff Lees Thierry Boutsen Ralf Kelleners | Toyota GT-One | Toyota R36V 3.6L V8 twin turbo | 330 | Wikipedia contributors · CC BY-SA 4.0 |
| 1997 · 1997 24 Hours of Le Mans | DNF | 45 | LM-GT1 | Newcastle United Lister Cars | Geoff Lees · Tiff Needell · George FouchéGeoff Lees Tiff Needell George Fouché | Lister Storm GTL | Jaguar HE 7.0L V12 | 21 | Wikipedia contributors · CC BY-SA 4.0 |
| 1996 · 1996 24 Hours of Le Mans | 19 | 28 | LM-GT1 | Newcastle United Lister | Geoff Lees · Tiff Needell · Anthony ReidGeoff Lees Tiff Needell Anthony Reid | Lister Storm GTS | Jaguar HE 7.0L V12 | 295 | Wikipedia contributors · CC BY-SA 4.0 |
| 1995 · 1995 24 Hours of Le Mans | DNF | 52 | LM-GT1 | Lister Cars | Geoff Lees · Rupert Keegan · Dominic ChappellGeoff Lees Rupert Keegan Dominic Chappell | Lister Storm GTS | Jaguar HE 7.0L V12 | 40 | Wikipedia contributors · CC BY-SA 4.0 |
| 1993 · 1993 24 Hours of Le Mans | 8 | 38 | Category 1 | / Toyota Team TOM'S GB | Geoff Lees · Jan LAMMERS · Juan Manuel Fangio IIGeoff Lees Jan Lammers Juan Manuel Fangio II | Toyota TS010 | Toyota RV10 3.5L V10 | 353 | Wikipedia contributors · CC BY-SA 4.0 |
| 1992 · 1992 24 Hours of Le Mans | DNF | 7 | Category 1 | Toyota Team TOM'S GB | Geoff Lees · David Brabham · Ukyo KatayamaGeoff Lees David Brabham Ukyo Katayama | Toyota TS010 | Toyota RV10 3.5L V10 | 192 | Wikipedia contributors · CC BY-SA 4.0 |
| 1992 · SWC 500 km Monza | 1 | 7 | 1. C1 | Toyota Team Tom's | Geoff Lees · Hitoshi Ogawa | Toyota TS010 | — | 87 | WSPR historical record |
| 1992 · SWC 500 km Silverstone | retired | 7 | C1 | Toyota Team Tom's | Geoff Lees · Hitoshi Ogawa | Toyota TS010 | — | 55 | WSPR historical record |
| 1992 · SWC 500 km Silverstone | source_section_running_in_practice | - | C1 | Toyota Team Tom's | Geoff Lees · Jan LAMMERS | Toyota TS010 | — | | WSPR historical record |
| 1992 · SWC 500 km Donington | source_section_running_in_practice | 7T | | Toyota Team Tom's | Geoff Lees · Jan LAMMERS | Toyota TS010 | — | | WSPR historical record |
| 1992 · SWC 500 km Donington | 3 | 7 | 3. C1 | Toyota Team Tom's | Geoff Lees · David Brabham | Toyota TS010 | — | 125 | WSPR historical record |
| 1992 · SWC Suzuka 1000 km | 2 | 7 | C1 | Toyota Team Tom's | Jan LAMMERS · Geoff Lees · David Brabham | Toyota TS010 | — | 170 | WSPR historical record |
| 1992 · SWC 500 km Magny Cours | 3 | 7 | 3. C1 | Toyota Team Tom's | Geoff Lees · Jan LAMMERS | Toyota TS010 | — | 114 | WSPR historical record |
| 1991 · FIA Sportscar World Championship in Autopolis | 6 | 36 | 1 | Toyota Team Tom's | Geoff Lees · Andy Wallace | Toyota TS010 | — | 90 | WSPR historical record |
| 1990 · 1990 24 Hours of Le Mans | 6 | 36 | Gr.C1 | Toyota Team Tom's | Geoff Lees · Masanori Sekiya · Hitoshi OgawaGeoff Lees Masanori Sekiya Hitoshi Ogawa | Toyota 90C-V | Toyota R32V 3.2L V8 twin turbo | 347 | Wikipedia contributors · CC BY-SA 4.0 |
| 1990 · FIA WSPC - Fuji Film Cup, Suzuka Circuit | 4 | 36 | 2 | Toyota Team Tom's | Geoff Lees · Hitoshi Ogawa | Toyota 90C-V | — | 81 | WSPR historical record |
| 1990 · FIA WSPC - Trofeo Caracciolo, Monza | retired | 36 | | Toyota Team Tom's | Geoff Lees · Aguri Suzuki | Toyota 90C-V | — | 4 | WSPR historical record |
| 1990 · FIA WSPC - British Empire Trophy, Silverstone | 12 | 36 | | Toyota Team Tom's | Geoff Lees · John Watson | Toyota 90C-V | — | 95 | WSPR historical record |
| 1990 · FIA WSPC - Coupes de Spa, Spa Francorchamps | did_not_start | 37 | | Toyota Team Tom's | Geoff Lees · Aguri Suzuki | Toyota 90C-V | — | | WSPR historical record |
| 1990 · FIA WSPC, Dijon-Prenios | retired | 37 | | Toyota Team Tom's | Geoff Lees · John Watson | Toyota 89C-V | — | 9 | WSPR historical record |
| 1990 · FIA WSPC - ADAC Sportwagen WM, Nürburgring | retired | 37 | | Toyota Team Tom's | Geoff Lees · Hitoshi Ogawa | Toyota 90C-V | — | 96 | WSPR historical record |
| 1990 · FIA WSPC - Shell Donington Trophy | retired | 37 | | Toyota Team Tom's | Geoff Lees · John Watson | Toyota 89C-V | — | 112 | WSPR historical record |
| 1990 · FIA WSPC Mondial Players Ltd., Montreal | source_section_running_in_practice | 37T | | Toyota Team Tom's | Geoff Lees · John Watson | Toyota 90C-V | — | | WSPR historical record |
| 1990 · FIA WSPC Mondial Players Ltd., Montreal | 7 | 37 | | Toyota Team Tom's | Geoff Lees · John Watson | Toyota 89C-V | — | 60 | WSPR historical record |
| 1990 · FIA WSPC - Trofeo Hermanos Rodriguez, Mexico | retired | 37 | | Toyota Team Tom's | Geoff Lees · John Watson | Toyota 89C-V | — | 15 | WSPR historical record |
| 1989 · 1989 24 Hours of Le Mans | DNF | 37 | Gr.C1 | Toyota Team Tom's | Geoff Lees · Johnny, Earl Dumfries · John WatsonGeoff Lees Johnny, Earl Dumfries John Watson | Toyota 89C-V | Toyota R32V 3.2L V8 twin turbo | 58 | Wikipedia contributors · CC BY-SA 4.0 |
| 1989 · WSPC Suzuka | 20 | 37 | 9. C1 | Toyota Team Tom's | Geoff Lees · Johnny Dumfries | Toyota 89C-V | — | 74 | WSPR historical record |
| 1989 · Coupe de Dijon, Dijon-Prenios | source_section_running_in_practice | - | | Toyota Team Tom's | Geoff Lees | Toyota | — | | WSPR historical record |
| 1989 · Coupe de Dijon, Dijon-Prenios | 4 | 37 | 4. C1 | Toyota Team Tom's | Johnny Dumfries · Geoff Lees | Toyota 88C | — | 126 | WSPR historical record |
| 1989 · Int. ADAC Trophäe, Nürburgring | 7 | 37 | 7. C1 | Toyota Team Tom's | Johnny Dumfries · Geoff Lees | Toyota 89C-V | — | 104 | WSPR historical record |
| 1989 · Coupes de Spa, Spa-Francorchamps | 8 | 37 | 8. C1 | Toyota Team Tom's | Johnny Dumfries · Geoff Lees | Toyota 89C-V | — | 67 | WSPR historical record |
| 1988 · 1988 24 Hours of Le Mans | 12 | 36 | Gr.C1 | Toyota Team Tom's | Geoff Lees · Masanori Sekiya · Kaoru HoshinoGeoff Lees Masanori Sekiya Kaoru Hoshino | Toyota 88C | Toyota 3S-GTM 2.1L S4 turbo | 351 | Wikipedia contributors · CC BY-SA 4.0 |
| 1988 · Fuji 1000 Kilometres, Fuji Speedway | 22 | 36 | 5. C1 | Toyota Team Tom's | Geoff Lees · Masanori Sekiya · Keiichi Suzuki | Toyota 88C-V | — | 159 | WSPR historical record |
| 1987 · 1987 24 Hours of Le Mans | DNF | 36 | Gr.C1 | Toyota Team Tom's | Geoff Lees · Alan Jones · Eje ElghGeoff Lees Alan Jones Eje Elgh | Toyota 87C-L | Toyota 3S-GTM 2.1L S4 turbo | 19 | Wikipedia contributors · CC BY-SA 4.0 |
| 1987 · Mount Fuji 1000 Kilometres | retired | 36 | C1 | Toyota Team Tom's | Alan Jones · Geoff Lees · Masanori Sekiya | Toyota 87C | — | 100 | WSPR historical record |
| 1986 · 1986 24 Hours of Le Mans | DNF | 36 | Gr.C1 | TOM'S Team | Satoru Nakajima · Geoff Lees · Masanori SekiyaSatoru Nakajima Geoff Lees Masanori Sekiya | Dome RC86C -L | Toyota 4T-GT 2.1L S4 turbo | 105 | Wikipedia contributors · CC BY-SA 4.0 |
| 1986 · Mount Fuji 1000 Kilometres, Fuji Speedway | 9 | 36 | 9. C1 | Tom's | Geoff Lees · Satoru Nakajima · Masanori Sekiya | Tom's 86C Toyota | — | 217 | WSPR historical record |
| 1985 · 1985 24 Hours of Le Mans | DNF | 38 | Gr.C1 | Dome Company | Eje Elgh · Geoff Lees · Toshio SuzukiEje Elgh Geoff Lees Toshio Suzuki | Dome 85C -L | Toyota 4T-GT 2.1L S4 turbo | 141 | Wikipedia contributors · CC BY-SA 4.0 |
| 1985 · Fuji 1000 Kilometres | 9 | 38 | 9. C1 | Dome Motorsport | Eje Elgh · Geoff Lees | Dome 85C Toyota | — | 58 | WSPR historical record |
| 1984 · Mount Fuji 1000 Kilometres | entry_only | 18 | C1 | Nova Engineering | Kunimitsu Takahashi · Kenji Takahashi · Geoff Lees | Porsche 956 | — | | WSPR historical record |
| 1984 · Mount Fuji 1000 Kilometres | retired | 37 | C1 | Team Ikuzawa | Tiff Needell · James Weaver · Geoff Lees | Tom's 84C Toyota (Ikuzawa 8 | — | 113 | WSPR historical record |
| 1983 · Mount Fuji 1000 Kilometres | source_section_did_not_practice | 37 | C | Team Ikuzawa | Derek Daly · Geoff Lees · Toshio Suzuki | Ikuzawa 83C Toyota (Tom's 8 | — | | WSPR historical record |
| 1982 · 1982 24 Hours of Le Mans | DNF | 31 | Gr.C | Nimrod Racing Automobiles | Tiff Needell · Bob Evans · Geoff LeesTiff Needell Bob Evans Geoff Lees | Nimrod NRA/C2 | Aston Martin DP1229 5.3L V8 | 55 | Wikipedia contributors · CC BY-SA 4.0 |
| 1982 · The Pace Petroleum 6 Hours, Silverstone | retired | 31 | C | Nimrod Racing Automobile | Geoff Lees · Bob Evans · DNS - Tiff Needell | Nimrod NRA/C2 Aston Mar | — | 148 | WSPR historical record |
| 1982 · Trophee Diners Club 1000 kilometres, Spa-Francorchamps | retired | 31 | C | Nimrod Racing Automobiles | Geoff Lees · Tiff Needell | Nimrod NRA/C2 Aston Mar | — | 98 | WSPR historical record |