| Code |
Race Name |
| BAN |
Bandera |
| BB |
Brazos Bend |
| B2B |
Border to Badlands |
| BC |
Big Cedar |
| CDR |
Cedar Ridge |
| CIR |
The Circus |
| CKCB |
Capt’n Karl’s Colorado Bend |
| CKMS |
Capt’n Karl’s Muleshoe |
| CKPF |
Capt’n Karl’s Pedernales Falls |
| CKRR |
Capt’n Karl’s Reveille Ranch |
| CR |
Cactus Rose |
| DV |
Dinosaur Valley |
| FV |
Fossil Valley |
| GR |
Grasslands |
| GW |
Goodwater |
| HH |
Hells Hills |
| HOG |
Hog’s Hunt |
| IDB |
Isle du Bois |
| JJ |
J&J Trail Race & Reunion |
| LH |
Light House |
| LP |
Lost Pines |
| LRR |
Little Rocky Raccoon |
| MF |
Mesquite Fire |
| MO |
Mosaic |
| NU |
Nueces |
| OF |
Oktoberfest |
| PBR |
Pandora’s Box of Rox |
| PD |
Palo Duro |
| PF |
Paleface |
| PK |
Possum Kingdom |
| PW |
Piney Woods (Houston) |
| PWT |
Piney Woods (Tyler) |
| R |
Rocky 50 |
| RC |
Rough Creek |
| RLR |
Rockledge Rumble |
| RR |
Rocky Raccoon |
| SB |
Saddle Blazer |
| SKY |
Sky Island |
| TG |
The Game |
| TJ |
Tinajas |
| TNT |
Toughest N’Texas |
| TSB |
TX Switchback |
| TTF |
TX Trail Running Festival |
| WC |
Wild Canyon |
| WH |
Wild Hare |
| WL |
Wonderland |
| WP |
Whispering Pines |
| XT |
Cross Timbers |
