PORSCHE RACING HISTORY1980 - Portland 100 Miles
3 August 1980 - Portland International Raceway, USA
John Fitzpatrick wins in a Porsche 935 K3/80
Overall - 1st, 2nd, 3rd : GTX - 1st, 2nd, 3rd : GTO - 1st, 3rd
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 935 K3/80 | 000 00023 | GTX | John Fitzpatrick (GB) | Dick Barbour Racing (USA) | 1st | 1st | 1st | 53 laps |
| 30 | Porsche 935 J | 930 890 0014 | GTX | Gianpiero Moretti (I) | Momo/Electrodyne (I) | 2nd | 2nd | 2nd | 53 laps |
| 86 | Porsche 935/80 | 000 00024 | GTX | Hurley Haywood (USA) | Bayside Disposal Racing (USA) | 3rd | 3rd | 3rd | 53 laps |
| 18 | Porsche 935 JLP-2 | 009 00043 | GTX | John Paul Sr. (USA) | JLP Racing (USA) | 4th | 4th | 4th | 52 laps |
| 0 | Porsche 935 K3/80 | 000 00017 | GTX | Ted Field (USA) | Interscope Racing (USA) | 5th | 5th | 5th | 52 laps |
| 3 | Porsche 935 M16 | 930 990 0032 | GTX | Jim Busby (USA) | Jim Busby (USA) | 6th | 6th | 6th | 52 laps |
| 88 | Porsche 935 | 930 770 0909 | GTX | Bruce Leven (USA) | Bayside Disposal Racing (USA) | 7th | 7th | 8th | 50 laps |
| 68 | Porsche 911 Carrera RSR | 005 0009 | GTO | Luis Mendez (DR) | Mendez Racing (DR) | 9th | 1st | 12th | 49 laps |
| 54 | Porsche 911 Carrera RSR | 911 360 0610 | GTO | Tony Garcia (USA) | Montura Racing (USA) | 11th | 3rd | 16th | 49 laps |
| 55 | Porsche 911 Carrera RSR | 911 560 9121 | GTO | Pete Smith (USA) | 14th | 6th | 18th | 48 laps | |
| 31 | Porsche 911 Carrera RSR | GTO | Dennis Lanfre (USA) | RSR Associates (USA) | 16th | 8th | 19th | 45 laps | |
| 4 | Porsche 935 K3 | 000 0009 | GTX | Skeeter McKitterick (USA) | Dick Barbour Racing (USA) | 19th | 11th | 7th | 9 laps - DNF |
IMSA - International Motor Sport Association
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