| AIK | Aiken |
| ALB | Albuquerque-NM |
| ANF | Anthony Downs |
| AQU | Aqueduct-NY |
| AP | Arlington Park-IL |
| ARP | Arapahoe Park-CO |
| ASD | Assiniboia Downs-Can |
| ATL | Atlantic City-NJ |
| ATO | Atokad Downs-NE |
| BCF | Brown County Fair-SD |
| BEL | Belmont Park-NY |
| BEU | Beulah Park-OH |
| BIR | Birmingham Turf Club |
| BKF | Black Foot-ID |
| BM | Bay Meadows-CA |
| BMF | Bay Meadows Fair-CA |
| BOI | Les Bois Park-ID |
| BRD | Blue Ribbon Downs-OK |
| BRN | Harney County |
| CAM | Camden |
| CAS | Cassia County Fair |
| CBY | Canterbury Park-MN |
| CD | Churchill Downs-KY |
| CHA | Charleston |
| CHL | Charlotte |
| CLS | Columbus-NE |
| CMR | Camarero |
| CNL | Colonial Downs-VA |
| CPW | Chippewa Downs |
| CRC | Calder Race Course-FL |
| CT | Charles Town-WV |
| CWF | Central Wyoming Fair |
| DAY | Dayton |
| DED | Delta Downs-LA |
| DEL | Delaware Park-DE |
| DET | Detroit Race Course |
| DG | Cochise County Fair |
| DMR | Del Mar-CA |
| DUN | Greenelee County Fair |
| ELK | Elko County Fair |
| ELP | Ellis Park-KY |
| EMD | Emerald Downs-WA |
| EMT | Emmett |
| EUR | Eureka Downs-KS |
| EVD | Evangeline Downs-LA |
| FAI | Fair Hill |
| FAR | N. Dakota Horse Park-ND |
| FAX | Fairfax |
| FE | Fort Erie-Can |
| FER | Ferndale-CA |
| FG | Fair Grounds-LA |
| FH | Far Hills |
| FL | Finger Lakes-NY |
| FLG | Flagstaff |
| FMT | Fair Meadows at Tulsa-OK |
| FNO | Fresno-CA |
| FON | Fonner Park-NE |
| FP | Fairmount Park-IL |
| FPL | Fair Play Park |
| FPX | Fairplex Park-CA |
| FS | Flagstaff-AZ |
| FTP | Fort Pierre |
| FX | Foxfield |
| GBF | Great Barrington Fair |
| GCF | Gila County Fair |
| GF | Great Falls |
| GG | Golden Gate Fields-CA |
| GIL | Gillespie Cty. Fairgrounds |
| GLD | Great Lakes Downs-MI |
| GLN | Glyndon |
| GN | Grand National |
| GP | Gulfstream Park-FL |
| GPR | Grande Prairie |
| GRM | Great Meadow |
| GR | Grants Pass-OR |
| GS | Garden State Park |
| GV | Genesee Valley |
| HAW | Hawthorne-IL |
| HCF | Humboldt County |
| HIA | Hialeah Park |
| HLN | Helena Downs |
| HOO | Hoosier Park-IN |
| HOU | Sam Houston Race Park-TX |
| HPO | Horsemen’s Park-NE |
| HST | Hastings Park-Can |
| IND | Indiana Downs-IN |
| JRM | Jerome County Fair |
| KAM | Kamloops-Can |
| KD | Kentucky Downs-KY |
| KEE | Keeneland-KY |
| KIN | Kin Park-Can |
| KSP | Kalispell-MT |
| LA | Los Alamitos-CA |
| LAD | Louisiana Downs-LA |
| LEV | Little Everglades |
| LNN | Lincoln State Fair-NE |
| LRL | Laurel Park-MD |
| LS | Lone Star Park-TX |
| MAF | Marias Fair-MT |
| MAL | Malvern |
| MAN | Manor Downs-TX |
| MC | Miles City |
| MD | Marquis Downs-Can |
| MDA | Melville District Agripar |
| MED | Meadowlands-NJ |
| MID | Middleburg |
| MIL | Millarville |
| MNR | Mountaineer Park-WV |
| MOF | Mohave County Fair |
| MON | Monkton |
| MOR | Morven Park |
| MPM | Mt. Pleasant Meadows-MI |
| MTH | Monmouth Park-NJ |
| MTP | Montpelier |
| NMP | Northhampton Fair-MA |
| NP | Northlands Park-Can |
| OKR | Oak Ridge |
| ONE | Oneida County Fair |
| OP | Oaklawn Park-AR |
| OSA | Oak Tree at Santa Anita-CA |
| PEN | Penn National-PA |
| PHA | Philadelphia Park-PA |
| PID | Presque Isle Downs-PA |
| PIM | Pimlico-MD |
| PLA | Playfair |
| PLN | Pleasanton-CA |
| PM | Portland Meadows-OR |
| PMT | Pine Mtn-Calloway Garden |
| POD | Pocatello Downs |
| PR | El Commandante |
| PRM | Prairie Meadows-IA |
| PRV | Prineville Turf Club |
| PW | Percy Warner |
| QBY | Queensbury Downs |
| RD | River Downs-OH |
| RDM | Red Mile-KY |
| RET | Retama Park-TX |
| RIL | Rillito-AZ |
| RKM | Rockingham Park-NH |
| ROP | Round Up Park |
| RP | Remington Park-OK |
| RUI | Ruidoso Downs-NM |
| RUP | Minidoka County Fair-ID |
| SA | Santa Anita-CA |
| SAC | Sacramento Fair-CA |
| SAF | Graham County Fair |
| SAL | Salem |
| SAR | Saratoga-NY |
| SDY | Sandy Downs |
| SHW | Shawan Downs |
| SJ | Apache County Fair |
| SND | Sunflower Downs-BC |
| SOL | Solano Fair-CA |
| SON | Santa Cruz County Fair |
| SPT | Sportsman’s Park |
| SR | Santa Rosa-CA |
| SRP | SunRay Park-NM |
| STK | Stockton Fair-CA |
| STN | Stoneybrook at Five Points |
| STP | Stampede Park-Can |
| SUD | Sun Downs |
| SUF | Suffolk Downs-MA |
| SUN | Sunland Park-NM |
| TAM | Tampa Bay Downs-FL |
| TDN | Thistledown-OH |
| TET | Sandy Downs |
| TIL | Tillamook County Fair-OR |
| TIM | Timonium-MD |
| TP | Turfway Park-KY |
| TRM | Trinity Meadows |
| TRY | Tryon |
| TUP | Turf Paradise-AZ |
| UN | E. Oregon Livestock Show |
| UNI | Unionville |
| WDS | Woodlands-KS |
| WIL | Willowdale |
| WMF | Western Mt. Fair |
| WNT | Winterthur |
| WO | Woodbine-Can |
| WPR | White Pine Raceway |
| WRD | Will Rogers Downs-OK |
| WTS | Waitsburg Race Track |
| WW | Walla Walla |
| WYO | Wyoming Downs-WY |
| YAV | Yavapai Downs-AZ |
| YD | Yellowstone Downs |
| YKT | Yorkton Exh. Assoc. |
| ZIA | Zia Park-NM |
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