| 27.6.1958 | Preliminary Watkins Glen [MG] | 5 | | Henry Van Deusen | Henry Van Deusen | 3rd |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 26 | | Fred Reynolds | Fred Reynolds | DNA |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 31 | | Richard Soulsby | Dick Soulsby | DNA |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 42 | | Monty Allen | Monty Allen | DNF |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 50 | | Edward Richard, Jr. | Ed Richard Jr. | 8th |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 51 | | Ronald Ference | Ronald Ference | DNA |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 56 | | Jack Paveling | Jack Paveling | 4th |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 59 | | Johnny Boyd | Johnny Boyd | DNA |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 80 | | Dennis Miller | | 7th |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 83 | | Jack Terhaar | Jack TerHaar | 5th |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 86 | | Art Smith | Arthur Smith, Jr. | 9th |
| 27.6.1958 | Preliminary Watkins Glen [MG] | 89 | | Richard Kinsey | Richard Kinsey | 10th |
| 28.6.1958 | Preliminary Riverside [MG] | 67 | | Elliot Forbes-Robinson | Ken Swanson | 3rd |
| 28.6.1958 | Preliminary Riverside [MG] | 79 | | Vernon Stephan | | DNF |
| 28.6.1958 | Preliminary Riverside [MG] | 89 | | Ray Pickering | Ray Pickering | 2nd |
| 28.6.1958 | Preliminary Riverside [MG] | 128 | | Robert Scurlock | | 1st |
| 28.6.1958 | Preliminary Riverside [MG] | | | Loyal Davies | Long Beach MG Car Club Racing Team | ?th |
| 29.6.1958 | Riverside [FP+GP] | 4 | | Mark Sanders | | DNF |
| 29.6.1958 | Riverside [FP+GP] | 15 | | Harold Greenberg | | DNF |
| 29.6.1958 | Riverside [FP+GP] | 22 | | Charles Berg | | DNF |
| 29.6.1958 | WJC Charterhall [S1.5] | 27 | | Jack Richmond | J. M. Richmond | DNA |
| 29.6.1958 | Riverside [FP+GP] | 64 | | Richard Quint | | 11th |
| 29.6.1958 | Riverside [FP+GP] | 67 | | Elliot Forbes-Robinson | Long Beach MG Car Club Racing Team (Ken Swanson) | 8th |
| 29.6.1958 | Riverside [FP+GP] | 89 | | Ray Pickering | | DNF |
| 29.6.1958 | Riverside [Ladies] | 89 | | Ruth Doushkess | Ray Pickering | DNS |
| 29.6.1958 | Riverside [FP+GP] | 100 | | Art Greycloud | | 13th |
| 29.6.1958 | Riverside [FP+GP] | 125 | | Jim Chaffee | | DNS |
| 29.6.1958 | Riverside [FP+GP] | 128 | | Robert Scurlock | | 7th |
| 29.6.1958 | St. Eugene [S1.6] | | | Ross de St. Croix | | 2nd |
| 4.7.1958 | Orange County [Production 1.6] | | | Jim Nieland | | 3rd |
| 4.7.1958 | Orange County [Ladies] | | | Barbara Scott | | 2nd |
| 5.7.1958 | LASC Green Acres [MG] | 1 | | Harry Entwistle | Gulliver Motors | 3rd |
| 5.7.1958 | LASC Green Acres [Trophy] | 1 | | Harry Entwistle | Gulliver Motors | 7th |
| 5.7.1958 | LASC Green Acres [S1.5] | 1 | | Harry Entwistle | Gulliver Motors | DNA |
| 5.7.1958 | LASC Green Acres [MG] | 2 | | Bryant Jones | Bryant Jones | 13th |
| 5.7.1958 | SCCA National Lime Rock [FP] | 4 | | | | DNS |
| 5.7.1958 | LASC Green Acres [MG] | 6 | | John Morawski | Ecurie Sans Sous | DNA |
| 5.7.1958 | LASC Green Acres [S1.5] | 6 | | John Morawski | Ecurie Sans Sous | DNA |
| 5.7.1958 | LASC Green Acres [MG] | 11 | | Emrys Jones | Emrys Jones | 6th |
| 5.7.1958 | LASC Green Acres [MG] | 14 | | Ian Grant | Ian Grant | DNA |
| 5.7.1958 | LASC Green Acres [Formula Libre] | 14 | | Ian Grant | Ian Grant | DNA |
| 5.7.1958 | LASC Green Acres [S1.5] | 14 | | Ian Grant | Ian Grant | DNA |
| 5.7.1958 | LASC Green Acres [S1.5] | 18 | | Jack Broad | Jack Broad | 8th |
| 5.7.1958 | LASC Green Acres [S1.5] | 18 | | Jack Broad | Jack Broad | 6th |
| 5.7.1958 | LASC Green Acres [MG] | 21 | | Del Lance | Del Lance | DNA |
| 5.7.1958 | LASC Green Acres [S1.5] | 21 | | Del Lance | Del Lance | 10th |
| 5.7.1958 | LASC Green Acres [MG] | 23 | | Don Chambers | J. D. Chambers | 4th |
| 5.7.1958 | Novice Vaca Valley [Production 1.6] | 25 | | Elroy Anderson | Juanita Anderson | DNA |
| 5.7.1958 | LASC Green Acres [MG] | 29 | | Thomas Clifton | Thomas D. Clifton | 9th |
| 5.7.1958 | SCCA National Lime Rock [FP] | 30 | | James Stevens | | 9th |
| 5.7.1958 | Novice Vaca Valley [Production 1.6] | 31 | | Leon Mandel | Ed La Mantia | DNA |
| 5.7.1958 | Preliminary Vaca Valley [Alfa+MGA+356] | 32 | | Bob Potter | Bob Potter | DNA |
| 5.7.1958 | SCCA National Lime Rock [FP] | 38 | | Sherman Decker | | 3rd |
| 5.7.1958 | Preliminary Vaca Valley [Alfa+MGA+356] | 40 | | Jack Dalton | Jack Dalton | DNA |
| 5.7.1958 | LASC Green Acres [S+2.6] | 46 | | Bill Blum | William Blum | DNA |
| 5.7.1958 | LASC Green Acres [Formula Libre] | 46 | | Bill Blum | William Blum | DNA |
| 5.7.1958 | LASC Green Acres [S1.5] | 47 | | Graham Hill | Scale's Garage Ltd. | DNA |
| 5.7.1958 | LASC Green Acres [MG] | 47 | | Graham Hill | Scale's Garage Ltd. | 7th |
| 5.7.1958 | LASC Green Acres [MG] | 49 | | John Francis | J. C. Francis | 12th |
| 5.7.1958 | LASC Green Acres [MG] | 51 | | Walter Sayers | Walter J. Sayers | 15th |
| 5.7.1958 | LASC Green Acres [S1.5] | 51 | | Walter Sayers | Walter J. Sayers | DNA |
| 5.7.1958 | Preliminary Vaca Valley [Alfa+MGA+356] | 52 | | Fraser Sibbald | Frazer Sibbald | DNA |
| 5.7.1958 | LASC Green Acres [MG] | 55 | | Henry Howarth | Henry Howarth | DNA |
| 5.7.1958 | SCCA National Lime Rock [FP] | 56 | | Dennis Müller | | DNF |
| 5.7.1958 | Novice Vaca Valley [Production 1.6] | 61 | | Charles H. Serlis | Charles H. Serlis | DNA |
| 5.7.1958 | LASC Green Acres [MG] | 71 | | Edward Russell | Edward L. Russell | 8th |
| 5.7.1958 | LASC Green Acres [S1.5] | 71 | | Edward Russell | Edward L. Russell | DNA |
| 5.7.1958 | LASC Green Acres [MG] | 73 | | William Hopkins | Ecurie Grande | 10th |
| 5.7.1958 | LASC Green Acres [S1.5] | 73 | | William Hopkins | Ecurie Grande | 13th |
| 5.7.1958 | LASC Green Acres [Formula Libre] | 73 | | William Hopkins | Ecurie Grande | DNA |
| 5.7.1958 | LASC Green Acres [MG] | 74 | | Bill Hammond | Ecurie Grande | 16th |
| 5.7.1958 | LASC Green Acres [Formula Libre] | 74 | | Bill Hammond | Ecurie Grande | 4th |
| 5.7.1958 | LASC Green Acres [S1.5] | 74 | | Bill Hammond | Ecurie Grande | DNA |
| 5.7.1958 | LASC Green Acres [Trophy] | 74 | | Bill Hammond | Ecurie Grande | 15th |
| 5.7.1958 | LASC Green Acres [S1.5] | 78 | | Ford / Rodgman | Ecurie Ad Hades Cumpunia | DNA |
| 5.7.1958 | LASC Green Acres [Formula Libre] | 78 | | Ford / Rodgman | Ecurie Ad Hades Cumpunia | DNA |
| 5.7.1958 | LASC Green Acres [MG] | 78 | | Ford / Rodgman | Ecurie Ad Hades Cumpunia | DNA |
| 5.7.1958 | LASC Green Acres [MG] | 85 | | Robert Soch | | 5th |
| 5.7.1958 | LASC Green Acres [S1.5] | 100 | | Jack Paveling | | 5th |
| 5.7.1958 | LASC Green Acres [MG] | 100 | | Jack Paveling | | 1st |
| 5.7.1958 | LASC Green Acres [S1.5] | 100 | | Jack Paveling | | 2nd |
| 5.7.1958 | LASC Green Acres [Trophy] | 100 | | Jack Paveling | | 10th |
| 5.7.1958 | Novice Vaca Valley [Production 1.6] | 106 | | Joyce Sweet | Joyce Sweet | DNA |
| 5.7.1958 | Preliminary Vaca Valley [Alfa+MGA+356] | 110 | | Bob Winkelmann | Ed Crooks | DNA |
| 5.7.1958 | LASC Green Acres [MG] | 111 | | Kent Harris | Williams & Leavens Motors | DNA |
| 5.7.1958 | LASC Green Acres [Formula Libre] | 111 | | Kent Harris | Williams & Leavens Motors | DNA |
| 5.7.1958 | LASC Green Acres [S1.5] | 111 | | Kent Harris | Williams & Leavens Motors | DNA |
| 5.7.1958 | SCCA National Lime Rock [FP] | 118 | | Dan Donoghue | | 10th |
| 5.7.1958 | Preliminary Vaca Valley [Alfa+MGA+356] | 131 | | Randall Cowherd | W. T. Ribbs | DNA |
| 5.7.1958 | Novice Vaca Valley [Production 1.6] | 134 | | Rick Hilgers | Richard Hilgers | DNA |
| 5.7.1958 | Novice Vaca Valley [Production 1.6] | 135 | | Gilbert Haley | Gilbert F. Haley | DNA |
| 5.7.1958 | Novice Vaca Valley [Modified] | 158 | | Eugene Smith | Dennis Riley | DNA |
| 5.7.1958 | Novice Vaca Valley [Production 1.6] | 182 | | Ray De Costa | Raymond De Costa | DNA |
| 5.7.1958 | LASC Green Acres [Trophy] | 333 | | Gord Brown | Bruce McEachern Sports Cars | 9th |
| 5.7.1958 | LASC Green Acres [S1.5] | 333 | | Gord Brown | Bruce McEachern Sports Cars | DNA |
| 5.7.1958 | LASC Green Acres [MG] | 333 | | Gord Brown | Bruce McEachern Sports Cars | 2nd |
| 5.7.1958 | SCCA National Lime Rock [FP] | 801 | | Don Urian | | 8th |
| 5.7.1958 | Novice Hammond [S1.6] | | | Roy Dees | | 4th |
| 5.7.1958 | Novice Hammond [S1.6] | | | Charles Guidroz | | 3rd |
| 5.7.1958 | Novice Hammond [S1.6] | | | Bill Campbell | | 2nd |