Montana
Snowpack & runoff
Snow-water equivalent by basin and the seasonal runoff outlook for Montana'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 Hole River | Southwest Montana | 0.5" | 0.5" / 0.3" | ~Jul 1 |
| Bighorn River | South Central Montana | 0.1" | 0.1" / 0.8" | ~Jun 20 |
| Bitterroot River | Western Montana | 0.2" | 0.2" / 0.0" | ~Jun 11 |
| Blackfoot River | Western Montana | 0.4" | 0.4" / 0.0" | ~Jun 6 |
| Clark Fork River | Western Montana | 0.7" | 0.7" / 0.2" | ~Jun 23 |
| Flathead River | Northwest Montana | 0.3" | 0.3" / 0.3" | ~Jun 28 |
| Gallatin River | Southwest Montana | 0.6" | 0.6" / 0.6" | ~Jun 24 |
| Madison River | Southwest Montana | 0.3" | 0.3" / 0.3" | ~Jun 24 |
| Middle Fork Flathead River | Northwest Montana | 0.4" | 0.4" / 0.4" | ~Jul 4 |
| Missouri River | Central Montana | 0.6" | 0.6" / 0.4" | ~Jun 24 |
| North Fork Flathead River | Northwest Montana | 0.2" | 0.2" / 0.3" | ~Jul 4 |
| Rock Creek | Western Montana | 0.7" | 0.7" / 0.0" | ~Jun 8 |
| Ruby River | Southwest Montana | 0.4" | 0.4" / 0.0" | ~May 28 |
| Smith River | Central Montana | 1.4" | 1.4" / 0.1" | ~Jun 10 |
| South Fork Flathead River | Northwest Montana | 0.2" | 0.2" / 0.0" | ~Jun 28 |
| Stillwater River | South Central Montana | 0.6" | 0.6" / 1.0" | ~Jun 30 |
| Yellowstone River | Southwest Montana | 0.3" | 0.3" / 0.4" | ~Jun 18 |
Lakes & reservoirs
| Lake | Region | Basin snowpack | SWE now / normal | Median melt-out |
|---|---|---|---|---|
| Clark Canyon Reservoir | Southwest Montana | 0.8" | 0.8" / 0.0" | ~May 21 |
| Hebgen Lake | Southwest Montana | 0.1" | 0.1" / 0.3" | ~Jun 24 |