Below are the assigned values for each race; these are assigned according to the table here. If you want to understand how these numbers are used to compute rankings, please read the NWSC Slalom Ranking Explanation for 1998.
| Race | Importance | Field Strength |
| Amoskeag | 6 | 6 |
| Bellefonte | 5 | 6 |
| BigPiney | 5 | 2 |
| Blackwater | 5 | 4 |
| Cedar | 6 | 5 |
| Codorus | 5 | 4 |
| CoveredBridge | 5 | 5 |
| Crystal | 5 | 6 |
| Esopus | 5 | 4 |
| Esopus-DBH-1 | 6 | 5 |
| Esopus-DBH-2 | 6 | 5 |
| FallCreek | 4 | 5 |
| Farmington | 5 | 5 |
| FIBArk | 5 | 7 |
| Fiddlehead | 5 | 5 |
| FiddlersElbow | 5 | 5 |
| BCE-JrOlyQUal | 6 | 5 |
| Jr-Olympics | 8 | 6 |
| Jr-Sr-Ms-Natl | 9 | 9 |
| Jr-Trials-1 | 9 | 6 |
| Jr-Trials-2 | 9 | 6 |
| LastDitch | 5 | 4 |
| Lehigh | 5 | 4 |
| Loyalsock | 5 | 5 |
| Mascoma | 6 | 8 |
| Nationals | 10 | 10 |
| NOC-DBH-1 | 7 | 10 |
| NOC-DBH-2 | 6 | 10 |
| N-Trials-Qual | 7 | 7 |
| Ocoee-DBH-1 | 6 | 10 |
| Ocoee-DBH-2 | 6 | 10 |
| PEPCO-1 | 5 | 10 |
| PEPCO-2 | 5 | 10 |
| Punchbrook | 5 | 5 |
| Rattlesnake | 6 | 10 |
| Riverfest | 5 | 5 |
| Riversport | 5 | 6 |
| Salmon | 5 | 4 |
| SalmonlaSac | 6 | 5 |
| Smith | 5 | 5 |
| Snoqualmie | 6 | 5 |
| SnydersMill | 9 | 7 |
| Tariffville | 7 | 10 |
| Trials-1 | 10 | 10 |
| Trials-3 | 10 | 10 |
| Trials-2 | 10 | 10 |