| 1st | 98 | Charlie Hayes / Earl Jones | McLaren Elva Mark II Chevrolet | Charles Hayes Racing | 2:26.2000 |
| 2nd | 26 | John Fulp | Lola T70 Mk.2 Chevrolet | Schroeder Racing Team | 2:31.6000 |
| 3rd | 10 | Chuck Parsons | McLaren Elva Mark II Chevrolet | Randy Hilton | 2:31.8000 |
| 4th | 77 | Mak Kronn | McKee Mk.6 Chevrolet | Judy Fritsch | 2:31.8000 |
| 5th | 25 | Ralph Salyer / Bill Mitchell | McKee Mk.6 Oldsmobile | Ralph Salyer | 2:32.4000 |
| 6th | 73 | Bud Gates / Jack Ensley | McLaren Elva Mark I Chevrolet | Bud Gates | 2:36.0000 |
| 7th | 9 | Skip Hudson | Lola T70 Chevrolet | R. E. Hudson | 2:36.4000 |
| 8th | 96 | Lothar Motschenbacher | McLaren Elva Mark II Chevrolet | Dan Blocker Motor Racing | 2:37.4000 |
| 9th | 54 | Dave Causey / Allan Barker | Lotus 19 Ford | Lewis Bean Causey | 2:41.8000 |
| 10th | 11 | Charlie Kolb | Ferrari Dino 206 S | Bruce Schroeder | 2:38.8000 |
| 11th | 3 | Brooke Doran / Carl Haas | McLaren Elva Mark II Ford | M. Brooke Doran | 2:39.0000 |
| 12th | 95 | Bob Harris / John Morton | Genie Mk X Oldsmobile | Dan Blocker Motor Racing | 2:39.2000 |
| 14th | 56 | Ralph Trieschmann / Chuck Dietrich | Porsche 906 | Ralph Trieschmann | 2:40.2000 |
| 15th | 7 | Joe Buzzetta / Günther Klass | Porsche 906 | Porsche of America | 2:39.0000 |
| 16th | 22 | Dick Thompson / Ed Lowther | Ford GT40 | Grady Davis | 2:41.0000 |
| 17th | 2 | M. R. J. Wyllie / Bob Nagel | Bobsy SR3 Climax | M. R. J. Wyllie | 2:40.6000 |
| 18th | 23 | Doug Revson / Peter Revson | Porsche 906 | Douglas Revson | 2:42.0000 |
| 19th | 65 | Roy Kumnick / Bob Spooner | Hamill SR3 Chevrolet | Tero Corvette | 2:41.8000 |
| 20th | 27 | Marv Shoenfeld / John Martin | Chevrolet Corvette Grand-Sport | W. M. Shoenfeld | 2:48.2000 |
| 21st | 12 | Mike Fisher / Pete Lovely | Porsche 906 | E. M. Chiles | 2:42.2000 |
| 22nd | 14 | Bob Nagel / M. R. J. Wyllie | Elva Mk VIII BMW | Robert Nagel | 2:49.8000 |
| 23rd | 69 | Lee Hall / Mike Hall | Porsche 906 | E. L. Hall | 2:48.6000 |
| 24th | 18 | Jerry Nelson / Tom Countryman | Porsche 904 GTS | Nodak Racing Team | 2:52.4000 |
| 25th | 1 | Robert Shaw / Richard Dagiel | Lotus 30 Ford | Robert Shaw | 2:51.0000 |
| 26th | 81 | Jerry Rosbach / Jack Baker | Genie Mk VIII Chevrolet | Jerry Rosbach | 2:56.0000 |
| 29th | 63 | Fred Pipin / Bill Morrison | Cooper Monaco T49 Ford | Tero Corvette | 2:57.0000 |
| 30th | 36 | Bob Grossman / Denise McCluggage | Ferrari 275 GTB/C | Bill Harrahs Modern Classic Motors | 2:57.8000 |
| 31st | 31 | George Dickinson / Don Devine | Elva - Porsche | George Dickinson | 2:57.4000 |
| 32nd | 67 | Ralph Scott / Alan Ross | Elva Mk VII Climax | G. Ralph Scott | 3:06.6000 |
| 34th | 74 | Mike Rahal / Ted Rand | Elva Mk VII Porsche | Michael Rahal | 3:10.4000 |
| 36th | 5 | Peter Dock / Jim Whelan | Chevrolet Corvette Sting Ray | Peter Dock | 3:14.0000 |
| 37th | 71 | Russ Tyndall / George Furman | Lotus Eleven | George Furman | 3:12.4000 |
| 38th | 47 | Dick Durant / John Martin | Durant Special Chevrolet | Dick Durant | 3:16.6000 |