Listed below are 80th and 90th percentile Standard Visual Ranges (SVR) for the 16 Class 1 Wildernesses Managed by the USDA Forest Service in the Pacific Northwest. The data were collected by camera from 1983-1992. The data were taken from:
| Boutcher, Steven. 1994. Visual Air Quality in the Pacific Northwest. An Analysis of Camera Data 1983-1992. USDA Forest Service. Pacific Northwest Region. |
| Wilderness | 80th
Percentile (km) |
90th
Percentile (km) |
| Pasayten | 296 | 355 |
| Glacier Peak | 296 | 355 |
| Alpine Lakes | 279 | 342 |
| Goat Rocks | 256 | 322 |
| Mt Adams | 257 | 300 |
| Mt Hood | 221 | 280 |
| Mt Jefferson | 239 | 292 |
| Mt Washington | 234 | 277 |
| Three Sisters | 236 | 276 |
| Diamond Peak | 248 | 299 |
| Mountain Lakes | *** | *** |
| Kalmiopsis | 275 | 319 |
| Gearhart | *** | *** |
| Strawberry Mountain | 256 | 296 |
| Eagle Cap | 251 | 308 |
| Hells Canyon | 263 | 318 |