Trenton 150
Trenton International Speedway
1 Mile Paved Oval
102 Laps/102 Miles
April 24, 1966
| Finish | Start | Driver | Car # | Sponsor/Name | Chassis | Engine | Laps | Status |
Points |
| 1 | 8 | Rodger Ward | 24 | American Red Ball | Lola | Offy | 102 | 1:01:15.51 99.904 | 300 |
| 2 | 5 | Gordon Johncock | 94 | Weinberger Homes | Gerhardt | Offy | 102 | Finished | 240 |
| 3 | 3 | Jim McElreath | 3 | Zink-Urschel-Slick | Brabham | Ford | 102 | Finished | 210 |
| 4 | 1 | Mario Andretti | 1 | Dean Van Lines | Brawner Hawk | Ford | 101 | Flagged | 180 |
| 5 | 10 | Bud Tingelstad | 40 | Federal Engineering | Trevis FE | Offy | 101 | Flagged | 150 |
| 6 | 11 | Ron Lux | 55 | Barnett Bros. | Kuzma FE | Offy | 99 | Flagged | 120 |
| 7 | 19 | Bobby Grim | 95 | Leader Card | Watson FE | Offy | 99 | Flagged | 90 |
| 8 | 18 | Bob Hurt | 36 | Viking Racing | Gerhardt | Offy | 99 | Flagged | 75 |
| 9 | 17 | Sam Sessions | 22 | Federal Engineering | Meskowski D | Offy | 98 | Flagged | 60 |
| 10 | 6 | Don Branson | 4 | Leader Card | Gerhardt | Ford | 98 | Flagged | 45 |
| 11 | 14 | Larry Dickson | 24 | Ken Brenn | Meskowski D | Offy | 98 | Flagged | 30 |
| 12 | 22 | Red Riegel | 87 | California Speed Shop | Halibrand | Offy | 98 | Flagged | 15 |
| 13 | 9 | Gary Congdon | 54 | Tassi Vatis | Huffaker | Offy | 95 | Flagged | |
| 14 | 12 | Carl Williams | 25 | Dayton Steel Wheel | Watson | Offy | 94 | Flagged | |
| 15 | 4 | A. J. Foyt | 82 | Sheraton-Thompson | Lotus | Ford | 85 | Broken rear end gear | |
| 16 | 13 | Ronnie Duman | 81 | Central Excavating | Dunlop D | Offy | 48 | Lost oil | |
| 17 | 21 | John Hollansworth | 42 | Hollansworth | Epperly FE | Offy | 47 | Broken oil line | |
| 18 | 15 | Bobby Unser | 7 | Vita Fresh Orange Juice | Meskowski D | Offy | 32 | Broken oil line | |
| 19 | 20 | Arnie Knepper | 20 | S & D | Meskowski D | Chevy | 32 | Engine | |
| 20 | 7 | Roger McCluskey | 78 | G. C. Murphy | Gerhardt | Ford | 29 | Spun out | |
| 21 | 2 | Lloyd Ruby | 29 | All American/Bardahl | Eagle | Ford | 23 | Engine | |
| 22 | 16 | Billy Foster | 9 | Harrison | Eisert | Chevy | 1 | Broken suspension | |
| -- | -- | Gary Bettenhausen | 61 | American Eagle | Meskowski D | Offy | -- | Blew engine practice | |
| -- | -- | Chuck Hulse | 12 | Wynn's | Watson | Ford | -- | Wrecked practice | |
| -- | -- | Bob King | 36 | Stahl Brothers | Kuzma D | Chevy | -- | Mechanical trouble | |
| -- | -- | Gig Stephens | 71 | Fairchild-Hiller | Halibrand | Offy | -- | Did not qualify | |
| -- | -- | Mike McGreevy | 85 | Caves Buick | Gerhardt | Offy | -- | Did not qualify | |
| -- | -- | Jud Larson | X | X | X | X | -- | Did not qualify | |
| -- | -- | Al Unser | X | X | X | X | -- | Did not appear |
| Lap Leaders | Total | Laps |
| Mario Andretti | 64 | 1-17, 40-86 |
| A. J. Foyt | 22 | 18-39 |
| Rodger Ward | 16 | 87-102 |