| 1st | 11 | Walt Hansgen / Mark Donohue | Lola T70 Ford | John Mecom, Jr. | 2:27.8000 |
| 2nd | 66 | Jim Hall / Hap Sharp / Ronnie Hissom | Chaparral 2A Chevrolet | Jim Hall | 2:29.4000 |
| 3rd | 26 | Ralph Salyer / Bill Mitchell | McLaren Elva Mark I Oldsmobile | Ralph Salyer | 2:30.0000 |
| 4th | 44 | Jerry Hansen / Pat Manning | Chevette (McKee Mk II Chevrolet) | Gerald J. Hansen | 2:32.8000 |
| 5th | 92 | Skip Scott / Augie Pabst | Ford GT40 | Essex Wire | 2:34.6000 |
| 6th | 39 | Charles Cox / Dan Fowler | Cooper King Cobra Ford | Charles Cox | 2:36.4000 |
| 7th | 23? | Dan Gerber / Tom Yeager | Shelby Cobra 289 | Gerber-Payne | 2:38.2000 |
| 8th | 54 | Dave Causey / Allan Barker | Lotus 19 Ford | David F. Causey | 2:39.4000 |
| 9th | 47 | Gerry Bruihl / Ed Leslie | Lotus 23 Climax | W. F. Goodrum, Enduro-Speed | 2:39.6000 |
| 10th | 91 | Dick Thompson / Ed Lowther | Shelby Cobra 427 | Essex Wire | 2:39.6000 |
| 11th | 4 | Mike Hall | 427 LMD (McKee Mk IV Ford) | George W. Lehmann | 2:39.8000 |
| 12th | 65 | Hap Sharp / Bruce Jennings / Jim Hall | Chaparral 2A Chevrolet | Hap Sharp | 2:40.0000 |
| 13th | 3 | Joe Buzzetta / George Follmer | Elva Mk VII S Porsche | Competition Imports, Inc. | 2:41.0000 |
| 14th | 46 | Dick Durant / John Martin | Durant Special | Dick Durant | 2:41.8000 |
| 15th | 37 | Don Skogmo / Scott Beckett | Genie Mk VIII Ford | Don R. Skogmo | |
| 16th | 16 | George Follmer / Earl Jones | Lotus 23 Porsche | Trans Ocean Motors 2 | 2:42.0000 |
| 17th | 77 | Mak Kronn / James Scott | Elva Mk VII BMW | S. K. E. Ltd. | 2:42.4000 |
| 18th | 57 | Chuck Dietrich / Alan Ross | Elva Mk VII BMW | Robert Amey | 2:42.6000 |
| 19th | 33 | Bob Johnson / Don Sesslar | Shelby Cobra 289 | Shelby-American | 2:42.8000 |
| 20th | 35 | Bob Kelce / Clint Lindburg | Elva Mk VII BMW | A. Clinton Lindburg | 2:44.2000 |
| 21st | 9 | George Wintersteen / Peter Goetz | Elva Mk VIII BMW | George Wintersteen | 2:47.2000 |
| 22nd | 6 | Gary Stephenson / Carl Haas | Elva Mk VII S Porsche | Gary Stephenson | 2:47.4000 |
| 23rd | 51 | William Kimberly / Denise McCluggage | Elva Mk VII S Porsche | Ed Weschler | 2:47.4000 |
| 24th | 24 | Doug Revson | Lotus 23P Climax | Douglas Revson | 2:48.2000 |
| 25th | 96 | Bob Grossman / Richard Holquist | Ferrari 250 LM | Scuderia Bear | 2:48.2000 |
| 27th | 13 | Tom Payne / Ray Cuomo | Shelby Cobra 289 | Shelby-American | 2:48.8000 |
| 28th | 81 | Dean Causey / Lyle York | Elva Mk VII S BMW | Dean Causey | 2:49.4000 |
| 29th | 69 | Lee Hall / Mike Hall | Elva Mk VII S Porsche | E. L. Hall | 2:50.0000 |
| 30th | 1 | Robert Shaw / Phillip Martin | Lotus 23B | Robert J. Shaw | 2:50.2000 |
| 32nd | 64 | Budd Clusserath | Cheetah | C. A. Clusserath | 2:51.0000 |
| 33rd | 99 | Herb Swan | Elva Mk VII BMW | Herb Swan | 2:51.4000 |
| 34th | 18 | Jerry Nelson / Tom Countryman | Porsche 718 RS 60 | North Dakota Racing Team | 2:51.8000 |
| 35th | 17 | Jack Ensley / Don Brady | Apache - Chevrolet | Jack Ensley | 2:53.2000 |
| 36th | 82 | Sam Eller / Lloyd Barton | Porsche 718 RSK | Sam Eller | 2:55.4000 |
| 37th | 63 | Joe Scopelite | Bonanza - Chevrolet | | 2:56.0000 |
| 38th | 14 | Bob Nagel | Elva Mk VIII BMW | Robert J. Nagel | 2:57.4000 |
| 39th | 5 | Chuck Stoddard | Alfa Romeo Giulia TZ | Stoddard Racing Team | 2:59.8000 |
| 40th | 71 | Jack Baker / John Barlass | Black-Jack Special | Jack C. Baker | 3:00.2000 |
| 41st | 67 | Ralph Scott / Alan Ross | Elva Mk VII Climax | G. Ralph Scott | 3:00.2000 |
| 42nd | 72 | Phil Seitz / George MacDonald | Elva Mk VI Climax | Phil Seitz | 3:00.4000 |
| 44th | 41 | Hugh Major / David Gulick | Elva Mk VII | Robet D. Kelce | 3:01.2000 |
| 45th | 32 | Jerry Dunbar / Walt Gray | Chevrolet Corvette Sting Ray | R. Jerry Dunbar | 3:01.6000 |
| 46th | 45 | Gene Parsons | Lotus Elan | Gene Parsons | 3:03.8000 |
| 47th | 55? | Horst Kwech / Tom Terrell | Alfa Romeo Ti | Knauz Continental | 3:04.4000 |
| 48th | 22 | William Cooper | Ferrari 275 P | William H. Cooper | 3:05.2000 |
| 49th | 15 | Bill Kirtley / Dale Lang | Elva Mk VI | Bill Kirtley | 3:05.4000 |
| 51st | 36 | George Dickinson / Will Hanns Wiedman | Porsche RS | George W. Dickinson | 3:10.0000 |
| 52nd | 97 | James Marquardt | Chevrolet Corvette '57 | James Marquardt | 3:12.4000 |
| 53rd | 53 | William Bradley / Nick Hartman | Merlyn Mk.4 | William E. Bradley | 3:14.8000 |
| 54th | 48 | Richard Dagiel / Guy Wooley | Dirty-Pop Special | Richard T. Dagiel | 3:17.8000 |
| 55th | 10 | Bob Bienerth / Andrew Baumgardner | Chevrolet Corvette Sting Ray | Bob Bienerth | 3:18.8000 |
| 56th | 2 | M. R. J. Wyllie / Margaret Wyllie | Lola Mk.1 Climax | M. R. J. Wyllie | 3:24.0000 |
| 58th | 73 | Bud Gates | McLaren Elva Mark I Chevrolet | Bud Gates | |
| 59th | 27 | Marv Shoenfeld / John Martin | Chevrolet Corvette Grand-Sport | W. M. Shoenfeld | |
| 62nd | 29? | Paul Canary / Dave Heinz | Chevrolet Corvette Grand-Sport | Paul Canary | |
| 63rd | 28 | Byron Bossart | Laura Mk I | Byron Boosart | |
| 64th | 43 | Jack Brady / Robert Shufelt | Lotus Eleven | Robert S. Shufelt | |