| 1st | 0 | Danny Ongais / Ted Field / Milt Minter | Porsche 935/77A | Interscope Racing | 2:00.1520 |
| 2nd | 12 | Bob Wollek / Henri Pescarolo / Didier Jaunet | Porsche 935/77A | Porsche Kremer Racing | 2:00.3980 |
| 3rd | 2 | David Hobbs / Ronnie Peterson | BMW 320i Turbo | McLaren North America | 2:00.5780 |
| 4th | 99 | Rolf Stommelen / Toine Hezemans / Peter Gregg | Porsche 935/77A | JMS Brumos Porsche | 2:03.0970 |
| 5th | 3 | Martino Finotto / Carlo Facetti | Porsche 935 | Jolly Club | 2:04.9100 |
| 6th | 59 | Peter Gregg / Claude Ballot-Léna / Brad Frisselle | Porsche 935 | JMS Brumos Porsche | 2:05.9510 |
| 7th | 21 | Franz Konrad / Reinhold Jöst / Volkert Merl | Porsche 935 | Joest | 2:06.7510 |
| 8th | 6 | Dick Barbour / Manfred Schurti / Johnny Rutherford | Porsche 935/77A | Dick Barbour Performance | 2:06.9000 |
| 9th | 13 | Hal Shaw, Jr. / Jim Busby / Howard Meister | Porsche 935 | Bankrupt Inc Racing | 2:10.9390 |
| 10th | 14 | Josef Brambring / Dieter Schornstein / "John Winter" | Porsche 935 K2 | Kremer Porsche Racing | 2:13.9720 |
| 11th | 7 | Ludwig Heimrath / Jacques Bienvenue / Norm Ridgely | Porsche 935 | Heimrath Racing | 1:55.4030 |
| 12th | 09 | Gary Belcher / Doc Bundy / Al Holbert | Porsche 934/5 | Belcher Racing | 1:56.8280 |
| 13th | 19 | Chris Cord / Jim Adams | Chevrolet Monza | Chris Cord Racing | 1:59.1000 |
| 14th | 33 | Bonky Fernandez / John Paul / Phil Currin | Porsche Carrera RSR | Boricua Racing | 2:01.9560 |
| 15th | 20 | Richard Bostyan / Jerry Thompson / Don Yenko | Chevrolet Corvette | Richard Bostyan | 2:03.3600 |
| 16th | 65 | John Morton / Tony Adamowicz / Hal Sahlman / Bobby Carradine | Ferrari 365 GTB/4 | Carradine/Dan Ward Racing | 2:04.0210 |
| 17th | 5 | François Migault / Lucien Guitteny / Gregg Young | Ferrari 365 GT4/BB | Grand Competition Cars Inc. | 2:04.3290 |
| 18th | 32 | Steve Earle / Bob Akin / Rick Knoop | Porsche 911 Carrera RSR | Earle/Akin Racing Associates Inc. | 2:05.4910 |
| 19th | 24 | Tom Frank / Bob Bergstrom | Porsche Carrera RSR | Executive Industries | 2:05.9690 |
| 20th | 73 | Clark Howey / Dale Koch / David Crabtree | Chevrolet Camaro | Howey Farms | 2:06.9610 |
| 21st | 58 | Diego Febles / Alec Poole | Porsche 911 Carrera RSR 3.0 | Diego Febles Racing | 2:07.2350 |
| 22nd | 72 | Carl Thompson / Billy Hagan / Rusty Schmidt | Chevrolet Corvette | Bill Arnold Racing | 2:07.2710 |
| 23rd | 56 | Richard Valentine / Craig Carter / Murray Edwards | Chevrolet Camaro | Carter Bros. Racing | 2:07.4770 |
| 24th | 82 | Carm Solomone / Fred Lang / Buzz Fyhrie | Chevrolet Camaro | Carm Solomone | 2:07.4970 |
| 25th | 86 | Janet Guthrie / Hugh Kleinpeter / Jef Stevens | De Tomaso Pantera GT4K | Team Pantera FL | 2:07.8150 |
| 26th | 01 | Dave White / Gary Mesnick / J. Dana Roehrig | Porsche 911 S | Roehrig Racing | 2:07.8390 |
| 27th | 48 | John Carusso / Emory Donaldson / Luis Sereix | Chevrolet Corvette | Autodyne | 2:08.1980 |
| 28th | 52 | Yoshimi Katayama / Yojiro Terada / Roger Mandeville | Mazda RX-3 | Mazda Auto Tokyo Co. Ltd. | 2:08.7790 |
| 29th | 38 | Bill McDill / Mike Meldeau | Chevrolet Camaro | Meldeau Tire Co. | 2:08.8930 |
| 30th | 80 | Herb Adams / Pat Bedard / Marv Thomson | Oldsmobile Cutlass | Herb Adams | 2:08.9110 |
| 31st | 94 | Preston Henn / Hal Sahlman / Sandy Satullo | Ferrari 365 GTB/4 | Swap Shops | 2:08.9110 |
| 32nd | 4 | Dino Mallet / Bob Bondurant / Sergio Romolotti | Ferrari 308 GTB | Jolly Club | 2:08.9360 |
| 33rd | 8 | Felice Besenzoni / Luciano Dal Ben / Byron Wever | Ferrari 308 GTB | Jolly Club | 2:09.1800 |
| 34th | 60 | John Thomas / Ren Tilton / Rusty Bond | Porsche 911 | R&R Racing | 2:09.4100 |
| 35th | 29 | Richard Weiss / Bill Alsup / Bill Follmer | Porsche 911 S | Richard C. Weiss Racing Ent. | 2:09.9470 |
| 36th | 46 | Mauricio DeNarvaez / Albert Naon / Tony Garcia | Porsche 911 Carrera RSR | Mauricio DeNarvaez | 2:10.7250 |
| 37th | 71 | Francisco Romero / Ernesto Soto / Hardie Beloff | Porsche 911 S | Bill Scott Racing | 2:11.7110 |
| 38th | 54 | John Tunstall / Stephen Behr / Lou Timolat | Porsche Carrera RSR | T&C/Big Apple Racing | 2:11.7320 |
| 39th | 76 | Frank Thomas / Lee Mueller / Logan Blackburn | Porsche 911 | Quality Inn of Boise, ID | 2:12.3060 |
| 40th | 17 | Sam Fillingham / Tim Chitwood / K. P. Jones | Chevrolet Nova | Tim Chitwood | 2:14.2370 |
| 41st | 77 | Amos Johnson / Dennis Shaw / Charles Woodward | AMC Hornet AMX | Levi's Team Highball | 2:14.4090 |
| 42nd | 53 | Jim Downing / Stu Fisher / Walt Bohren / Roger Mandeville | Mazda RX-3 | Mazda Auto Tokyo Co. Ltd. | 2:14.5990 |
| 43rd | 02 | Dick Neland / Al Levenson / Tom Brown | Chevrolet Corvette | Al Levenson | 2:14.7090 |
| 44th | 61 | Taku Akaike / Al Cosentino | Mazda RX-3 | Faza Squadra | 2:14.7830 |
| 45th | 37 | Bob Buchler / Eddie Johnson / Clay Young | Chevrolet Camaro | Clay Young | 2:15.5150 |
| 46th | 36 | Ron Case / Dave Panaccione | Porsche 911 | Case Racing | 2:15.5340 |
| 47th | 85 | John Hulen / Ron Coupland / Nick Engels | Porsche 914/6 | John E. Hulen | 2:16.3630 |
| 48th | 15 | Bruno Beilcke / Sepp Grinbold / Alf Gebhardt | BMW 3.0 CSL | Bavarian Motors Inc. | 2:16.3930 |
| 49th | 22 | Bill Harriss / Volker Bruckmann | Porsche 911 E | Music City P&A | 2:16.4680 |
| 50th | 18 | Dick Gauthier / Jack Swanson / Brad West | Chevrolet Camaro | Ours & Hours Racing | 2:16.6740 |
| 51st | 05 | Stephen Bond / Dale Kreider / Philip Dann | Chevrolet Monza | Dale Kreider Racing | 2:17.1720 |
| 52nd | 78 | Bobby Hillin / William Henderson / Richard Turner | Ferrari 365 GTB/4 | Western Motor Works | 2:17.3570 |
| 53rd | 9 | Brian Goellnicht / José Marina / Jack May / Anatoly Arutunoff | Lancia Stratos | Automobiles International | 2:17.4920 |
| 54th | 27 | Pierre Honegger / Bill Scott / Mark Hutchins | Mazda RX-3 | Z&W Enterprises | 2:17.6490 |
| 55th | 08 | Terry Wolters / Jack Refenning / Ray Mummery | Porsche 911 S | Terry Wolters | 2:17.9950 |
| 56th | 84 | Chris Doyle / John Maffucci / Bob Speakman | Datsun 260Z | World Parts | 2:18.4140 |
| 57th | 34 | George Drolsom / Hugh Davenport / Mark Greb | Porsche 911 S | Drolsom Racing Inc. | 2:18.4260 |
| 58th | 55 | Emiliano Rodriguez / Hiram Cruz | Lotus Europa Ford | Emiliano Rodriguez | 2:18.8830 |
| 59th | 39 | Greg Pickett / Neil Bonnet / Bruce Canepa | Porsche Carrera RSR | Pickett Racing | 2:22.9750 |
| 60th | 95 | Hurley Haywood / Bob Hagestad / Doc Bundy | Porsche 935 | Bob Hagestad | no time |
| 61st | 07 | Dave Cowart / Charles Mendez / Joe Castellano | Porsche Carrera RSR | Morrison's Porsche | no time |
| 62nd | 10 | Guy Church / Rick Kump / Bob Lee | AMC AMX | Bob's Speed Products | 2:23.9990 |
| 63rd | 51 | John Hotchkis / Robert Kirby / Dennis Aase | Porsche 911 | Wynn's International | 2:24.8500 |
| 64th | 25 | Kenper Miller / Paul Miller | BMW 3.5 CSL | KWM Racing | 2:25.4390 |
| 65th | 91 | Bob Bondurant / Steve Cook / Ron Southern | Datsun 260Z | Bondurant School | 2:25.6620 |
| 66th | 68 | Luis Mendez / Mandy Gonzalez / Tato Ferrer | Porsche 911 Carrera RSR 3.0 | Luis Mendez | 2:26.0130 |
| 67th | 87 | Pedro Vazquez / Ron Oyler / Joseph Hamilton / Gunter Hamilton / Gunter Seipolt | Porsche 911 | Pedro Vazquez | 2:58.9800 |
| 68th | 50 | Charles Kleinschmidt / Lee Culpepper | MGB GT | Native Tan | 2:41.1670 |
| 69th | 03 | Dan Rice / Guido Levetto | Chevrolet Camaro | Guido Levetto | no time |