| Abbreviation | Definition |
|---|---|
| CTGF | California Trails & Greenways Foundation |
| DTTW | Down To The Woods |
| E2E | End-to-End |
| GEAR | Gaining Experience in Adventure Recreation |
| GMRPTC | Greater Minnesota Regional Parks and Trails Commission |
| GORP | Guide to Outdoor Recreation and Products |
| HETAP | High Efficiency Trail Assessment Process |
| HHG | Hitch Hiking Ghost |
| HHTC | Hamburg Hiking and Travel Club |
| HIK | Hiking |
| HSHA | High Sierra Hikers Association |
| HTTB | Hiking Trekking and Travelling Buddies |
| LHHT | Laurel Highlands Hiking Trail |
| LSHT | Lone Star Hiking Trail |
| LYY | Likya Yolu Yürüyücüleri |
| MEC | Mountain Equipment Company |
| OB | Outward Bound |
| ORMT | Oak Ridges Moraine Trail |
| ORT | Oak Ridges Trail |
| ORTA | Oak Ridges Trail Association |