Idaho
Snowpack & runoff
Snow-water equivalent by basin and the seasonal runoff outlook for Idaho's rivers and lakes, translated into what it means for fishing: early or late runoff, high or low summer flows, how well reservoirs fill, and which waters hold up best. Updated daily through the snow season.
| River | Region | Basin snowpack | SWE now / normal | Median melt-out |
|---|---|---|---|---|
| Big Lost River | Central Idaho | 0.0" | 0.0" / 0.1" | ~Jun 7 |
| Big Wood River | South-Central Idaho | 0.0" | 0.0" / 0.0" | ~Jun 13 |
| Henry's Fork | Eastern Idaho | 0.0" | 0.0" / 0.0" | ~Jun 4 |
| Lochsa River | North-Central Idaho | 0.2" | 0.2" / 0.0" | ~Jun 14 |
| North Fork Clearwater River | North-Central Idaho | 0.0" | 0.0" / 0.0" | ~Jun 18 |
| Salmon River | Central Idaho | 0.0" | 0.0" / 0.0" | ~Jun 28 |
| Selway River | North-Central Idaho | 0.0" | 0.0" / 0.0" | ~Jun 2 |
| South Fork Snake River | Eastern Idaho | 0.0" | 0.0" / 0.0" | ~May 12 |
| St. Joe River | Panhandle | 0.1" | 0.1" / 0.0" | ~May 17 |
Lakes & reservoirs
| Lake | Region | Basin snowpack | SWE now / normal | Median melt-out |
|---|---|---|---|---|
| Chesterfield Reservoir | Eastern Idaho | 0.0" | 0.0" / 0.0" | ~May 21 |
| Henry's Lake | Eastern Idaho | 0.0" | 0.0" / 0.0" | ~Jun 4 |
| Island Park Reservoir | Eastern Idaho | 0.0" | 0.0" / 0.0" | ~Jun 4 |
| Mackay Reservoir | Central Idaho | 0.0" | 0.0" / 0.1" | ~Jun 7 |