Riverside 500 1963 var ett stockcarlopp ingående i Nascar Grand National Series (nuvarande Nascar Cup Series) som kördes 20 januari 1963 på den 2,7 mile (4,345 meter) långa road course-banan Riverside International Raceway i Riverside i Kalifornien. Totalt avverkades 499,5 miles (803,867 km) fördelat på 185 varv. Banunderlaget var asfalt. Loppet vanns av Dan Gurney i en Ford på tiden 5:53:20 körande för Holman-Moody. Gurneys snitthastighet uppgick till 84,965 mph. Det var Gurneys första seger av totalt fem i cup-serien. Prispotten uppgick till 50 265 dollar, varav 14 400 dollar gick till segraren.
| Plc | Nr | Förare | Team/ bilägare |
Konstruktör | Start | Varv | Ledda varv | |
|---|---|---|---|---|---|---|---|---|
| 1 | 28 | Dan Gurney | Holman-Moody | Ford | 11 | 185 | 120 | |
| 2 | 02 | A.J. Foyt | Nichels Engineering | Pontiac | 2 | 185 | 2 | |
| 3 | 14 | Troy Ruttman | Stroppe Motorsports | Mercury | 17 | 184 | 0 | |
| 4 | 22 | Fireball Roberts | Matthews Racing | Pontiac | 3 | 184 | 13 | |
| 5 | 7 | Bobby Johns | Shorty Johns | Pontiac | 25 | 182 | 0 | |
| 6 | 11 | Ned Jarrett | Burton-Robinson | Ford | 8 | 181 | 0 | |
| 7 | 5 | Billy Wade | Owens Racing | Dodge | 21 | 180 | 0 | |
| 8 | 54 | Jimmy Pardue | Pete Stewart | Pontiac | 6 | 179 | 0 | |
| 9 | 1 | Danny Letner | i.u. | Mercury | 28 | 179 | 0 | |
| 10 | 98 | Joe Ruttman | Carl Dane | Mercury | 30 | 176 | 0 | |
| 11 | 97 | Ron Hornaday | Frank Galpin | Ford | 26 | 176 | 0 | |
| 12 | 0 | Dave MacDonald | Holman Moody | Chevrolet | 13 | 176 | 0 | |
| 13 | 38 | Bob Perry | Bob Perry | Mercury | 39 | 175 | 0 | |
| 14 | 70 | Bob Ross | Bob Ross | Pontiac | 32 | 175 | 0 | |
| 15 | 4 | Rex White | Rex White | Chevrolet | 18 | 173 | 0 | |
| 16 | 19 | John Rostek | John Rostek | Ford | 27 | 172 | 0 | |
| 17 | 12 | Art Watts | i.u. | Ford | 10 | 171 | 0 | |
| 18 | 34 | Wendell Scott | Scott Racing | Chevrolet | 33 | 169 | 0 | |
| 19 | 61 | Richard Brown | i.u. | Chevrolet | 43 | 166 | 0 | |
| 20 | 50 | Harold Beal | i.u. | Dodge | 41 | 164 | 0 | |
| 21 | 51 | Scotty Cain | Scotty Cain | Ford | 31 | 162 | 0 | |
| 22 | 21 | Fred Lorenzen | Wood Brothers Racing | Ford | 16 | 158 | 0 | |
| 23 | 27 | Marshall Sargent | i.u. | Pontiac | 34 | 157 | 0 | |
| 24 | 8 | Joe Weatherly | Bud Moore Engineering | Pontiac | 5 | 148 | 0 | |
| 25 | 26 | Carl Joiner | Marquardt Racing | Chevrolet | 40 | 143 | 0 | |
| 26 | 10 | Jim Cook | Floyd Johnson | Dodge | 38 | 143 | 0 | |
| 27 | 75 | Jim Hurtubise | i.u. | Pontiac | 9 | 142 | 0 | |
| 28 | 20 | Jack Norton | Jack Norton | Chevrolet | 42 | 140 | 0 | |
| 29 | 40 | Eddie Pagan | Dick Getty | Chevrolet | 35 | 137 | 0 | |
| 30 | 88 | Don Noel | i.u. | Mercury | 24 | 126 | 0 | |
| 31 | 33 | Clem Proctor | Clem Proctor | Pontiac | 7 | 122 | 0 | |
| 32 | 80 | Sal Tovella | Tom Hawkins | Ford | 23 | 116 | 0 | |
| 33 | 6 | David Pearson | Owens Racing | Dodge | 20 | 113 | 0 | |
| 34 | 25 | Bill Clifton | Bill Clifton | Ford | 44 | 111 | 0 | |
| 35 | 2 | Bill Foster | Cliff Stewart Racing | Pontiac | 34 | 91 | 0 | |
| 36 | 41 | Jim Paschal | Petty Enterprises | Plymouth | 19 | 81 | 0 | |
| 37 | 15 | Parnelli Jones | Stroppe Motorsports | Mercury | 12 | 78 | 39 | |
| 38 | 77 | Marvin Porter | Vel Miletich | Ford | 22 | 67 | 0 | |
| 39 | 01 | Paul Goldsmith | Nichels Engineering | Pontiac | 1 | 59 | 3 | |
| 40 | 07 | Len Sutton | Nichels Engineering | Pontiac | 4 | 49 | 0 | |
| 41 | 43 | Richard Petty | Petty Enterprises | Plymouth | 15 | 27 | 0 | |
| 42 | 23 | Danny Weinberg | Carl Dane | Pontiac | 14 | 27 | 0 | |
| 43 | 62 | Curtis Crider | Curtis Crider | Mercury | 36 | 26 | 0 | |
| 44 | 44 | Lloyd Dane | Lloyd Dane | Chevrolet | 29 | 8 | 0 | |
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