Ruby River above reservoir near Alder, MT
USGS 06019500 · Montana · reports discharge (live), gauge height
Reading Ruby River above reservoir near Alder, MT…
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USGS 06019500 · Montana · reports discharge (live), gauge height
What the agencies suggest
Carry a pocket thermometer to monitor water temperatureNational Park Service
General guidance from the readings and the published lines named above, not a fishing forecast. Local rules and closures come first.
Reading Nov 5, 7:45 PM MST · provisional USGS data
Below normal for Nov 5 Steady · 24 h
Discharge, last 7 days: 169 readings from Oct 29, 8:45 PM MDT to Nov 5, 7:45 PM MST; ranging 107 to 139 ft³/s; latest 108 ft³/s; shaded band: typical range (25th–75th percentile) for each date.
USGS provisional data may be revised. Source: USGS instantaneous values.
| Time | Discharge (ft³/s) | Gauge height (ft) | Normal, 25th–75th (ft³/s) |
|---|---|---|---|
| Nov 5, 7:45 PM MST | 108 | 2.98 | 114–137 |
| Nov 5, 6:45 PM MST | 108 | 2.98 | 114–137 |
| Nov 5, 5:45 PM MST | 108 | 2.98 | 114–137 |
| Nov 5, 4:45 PM MST | 111 | 2.99 | 114–137 |
| Nov 5, 3:45 PM MST | 108 | 2.98 | 114–137 |
| Nov 5, 2:45 PM MST | 111 | 2.99 | 114–137 |
| Nov 5, 1:45 PM MST | 111 | 2.99 | 114–137 |
| Nov 5, 12:45 PM MST | 111 | 2.99 | 114–137 |
| Nov 5, 11:45 AM MST | 108 | 2.98 | 114–137 |
| Nov 5, 10:45 AM MST | 108 | 2.98 | 114–137 |
| Nov 5, 9:45 AM MST | 111 | 2.99 | 114–137 |
| Nov 5, 8:45 AM MST | 111 | 2.99 | 114–137 |
| Nov 5, 7:45 AM MST | 108 | 2.98 | 114–137 |
| Nov 5, 6:45 AM MST | 108 | 2.98 | 114–137 |
| Nov 5, 5:45 AM MST | 108 | 2.98 | 114–137 |
| Nov 5, 4:45 AM MST | 108 | 2.98 | 114–137 |
| Nov 5, 3:45 AM MST | 109 | 2.98 | 114–137 |
| Nov 5, 2:45 AM MST | 109 | 2.98 | 114–137 |
| Nov 5, 1:45 AM MST | 109 | 2.98 | 114–137 |
| Nov 5, 12:45 AM MST | 109 | 2.98 | 114–137 |
| Nov 4, 11:45 PM MST | 109 | 2.98 | 116–139 |
| Nov 4, 10:45 PM MST | 109 | 2.98 | 116–139 |
| Nov 4, 9:45 PM MST | 109 | 2.98 | 116–139 |
| Nov 4, 8:45 PM MST | 111 | 2.99 | 116–139 |
| Nov 4, 7:45 PM MST | 111 | 2.99 | 116–139 |
| Nov 4, 6:45 PM MST | 111 | 2.99 | 116–139 |
| Nov 4, 5:45 PM MST | 111 | 2.99 | 116–139 |
| Nov 4, 4:45 PM MST | 111 | 2.99 | 116–139 |
| Nov 4, 3:45 PM MST | 111 | 2.99 | 116–139 |
| Nov 4, 2:45 PM MST | 111 | 2.99 | 116–139 |
| Nov 4, 1:45 PM MST | 109 | 2.98 | 116–139 |
| Nov 4, 12:45 PM MST | 109 | 2.98 | 116–139 |
| Nov 4, 11:45 AM MST | 111 | 2.99 | 116–139 |
| Nov 4, 10:45 AM MST | 111 | 2.99 | 116–139 |
| Nov 4, 9:45 AM MST | 112 | 2.99 | 116–139 |
| Nov 4, 8:45 AM MST | 112 | 2.99 | 116–139 |
| Nov 4, 7:45 AM MST | 112 | 2.99 | 116–139 |
| Nov 4, 6:45 AM MST | 112 | 2.99 | 116–139 |
| Nov 4, 5:45 AM MST | 112 | 2.99 | 116–139 |
| Nov 4, 4:45 AM MST | 112 | 2.99 | 116–139 |
| Nov 4, 3:45 AM MST | 112 | 2.99 | 116–139 |
| Nov 4, 2:45 AM MST | 112 | 2.99 | 116–139 |
| Nov 4, 1:45 AM MST | 114 | 3 | 116–139 |
| Nov 4, 12:45 AM MST | 114 | 3 | 116–139 |
| Nov 3, 11:45 PM MST | 114 | 3 | 113–139 |
| Nov 3, 10:45 PM MST | 114 | 3 | 113–139 |
| Nov 3, 9:45 PM MST | 114 | 3 | 113–139 |
| Nov 3, 8:45 PM MST | 117 | 3.01 | 113–139 |
| Nov 3, 7:45 PM MST | 117 | 3.01 | 113–139 |
| Nov 3, 6:45 PM MST | 117 | 3.01 | 113–139 |
| Nov 3, 5:45 PM MST | 117 | 3.01 | 113–139 |
| Nov 3, 4:45 PM MST | 117 | 3.01 | 113–139 |
| Nov 3, 3:45 PM MST | 120 | 3.02 | 113–139 |
| Nov 3, 2:45 PM MST | 120 | 3.02 | 113–139 |
| Nov 3, 1:45 PM MST | 120 | 3.02 | 113–139 |
| Nov 3, 12:45 PM MST | 120 | 3.02 | 113–139 |
| Nov 3, 11:45 AM MST | 122 | 3.03 | 113–139 |
| Nov 3, 10:45 AM MST | 122 | 3.03 | 113–139 |
| Nov 3, 9:45 AM MST | 125 | 3.04 | 113–139 |
| Nov 3, 8:45 AM MST | 125 | 3.04 | 113–139 |
| Nov 3, 7:45 AM MST | 128 | 3.05 | 113–139 |
| Nov 3, 6:45 AM MST | 128 | 3.05 | 113–139 |
| Nov 3, 5:45 AM MST | 128 | 3.05 | 113–139 |
| Nov 3, 4:45 AM MST | 130 | 3.06 | 113–139 |
| Nov 3, 3:45 AM MST | 130 | 3.06 | 113–139 |
| Nov 3, 2:45 AM MST | 130 | 3.06 | 113–139 |
| Nov 3, 1:45 AM MST | 133 | 3.07 | 113–139 |
| Nov 3, 12:45 AM MST | 133 | 3.07 | 113–139 |
| Nov 2, 11:45 PM MST | 133 | 3.07 | 112–139 |
| Nov 2, 10:45 PM MST | 136 | 3.08 | 112–139 |
| Nov 2, 9:45 PM MST | 136 | 3.08 | 112–139 |
| Nov 2, 8:45 PM MST | 136 | 3.08 | 112–139 |
| Nov 2, 7:45 PM MST | 136 | 3.08 | 112–139 |
| Nov 2, 6:45 PM MST | 136 | 3.08 | 112–139 |
| Nov 2, 5:45 PM MST | 136 | 3.08 | 112–139 |
| Nov 2, 4:45 PM MST | 136 | 3.08 | 112–139 |
| Nov 2, 3:45 PM MST | 136 | 3.08 | 112–139 |
| Nov 2, 2:45 PM MST | 136 | 3.08 | 112–139 |
| Nov 2, 1:45 PM MST | 136 | 3.08 | 112–139 |
| Nov 2, 12:45 PM MST | 136 | 3.08 | 112–139 |
| Nov 2, 11:45 AM MST | 136 | 3.08 | 112–139 |
| Nov 2, 10:45 AM MST | 136 | 3.08 | 112–139 |
| Nov 2, 9:45 AM MST | 136 | 3.08 | 112–139 |
| Nov 2, 8:45 AM MST | 136 | 3.08 | 112–139 |
| Nov 2, 7:45 AM MST | 136 | 3.08 | 112–139 |
| Nov 2, 6:45 AM MST | 139 | 3.09 | 112–139 |
| Nov 2, 5:45 AM MST | 136 | 3.08 | 112–139 |
| Nov 2, 4:45 AM MST | 136 | 3.08 | 112–139 |
| Nov 2, 3:45 AM MST | 136 | 3.08 | 112–139 |
| Nov 2, 2:45 AM MST | 136 | 3.08 | 112–139 |
| Nov 2, 1:45 AM MST | 136 | 3.08 | 112–139 |
| Nov 2, 12:45 AM MST | 134 | 3.07 | 112–139 |
| Nov 1, 11:45 PM MST | 134 | 3.07 | 112–139 |
| Nov 1, 10:45 PM MST | 131 | 3.06 | 112–139 |
| Nov 1, 9:45 PM MST | 131 | 3.06 | 112–139 |
| Nov 1, 8:45 PM MST | 131 | 3.06 | 112–139 |
| Nov 1, 7:45 PM MST | 129 | 3.05 | 112–139 |
| Nov 1, 6:45 PM MST | 129 | 3.05 | 112–139 |
| Nov 1, 5:45 PM MST | 129 | 3.05 | 112–139 |
| Nov 1, 4:45 PM MST | 126 | 3.04 | 112–139 |
| Nov 1, 3:45 PM MST | 123 | 3.03 | 112–139 |
| Nov 1, 2:45 PM MST | 123 | 3.03 | 112–139 |
| Nov 1, 1:45 PM MST | 124 | 3.03 | 112–139 |
| Nov 1, 12:45 PM MST | 121 | 3.02 | 112–139 |
| Nov 1, 11:45 AM MST | 121 | 3.02 | 112–139 |
| Nov 1, 10:45 AM MST | 121 | 3.02 | 112–139 |
| Nov 1, 9:45 AM MST | 121 | 3.02 | 112–139 |
| Nov 1, 8:45 AM MST | 121 | 3.02 | 112–139 |
| Nov 1, 7:45 AM MST | 121 | 3.02 | 112–139 |
| Nov 1, 6:45 AM MST | 121 | 3.02 | 112–139 |
| Nov 1, 5:45 AM MST | 121 | 3.02 | 112–139 |
| Nov 1, 4:45 AM MST | 121 | 3.02 | 112–139 |
| Nov 1, 3:45 AM MST | 121 | 3.02 | 112–139 |
| Nov 1, 2:45 AM MST | 121 | 3.02 | 112–139 |
| Nov 1, 1:45 AM MST | 121 | 3.02 | 112–139 |
| Nov 1, 1:45 AM MDT | 121 | 3.02 | 112–139 |
| Nov 1, 12:45 AM MDT | 121 | 3.02 | 112–139 |
| Oct 31, 11:45 PM MDT | 119 | 3.01 | 111–137 |
| Oct 31, 10:45 PM MDT | 119 | 3.01 | 111–137 |
| Oct 31, 9:45 PM MDT | 119 | 3.01 | 111–137 |
| Oct 31, 8:45 PM MDT | 116 | 3 | 111–137 |
| Oct 31, 7:45 PM MDT | 119 | 3.01 | 111–137 |
| Oct 31, 6:45 PM MDT | 119 | 3.01 | 111–137 |
| Oct 31, 5:45 PM MDT | 116 | 3 | 111–137 |
| Oct 31, 4:45 PM MDT | 116 | 3 | 111–137 |
| Oct 31, 3:45 PM MDT | 116 | 3 | 111–137 |
| Oct 31, 2:45 PM MDT | 114 | 2.99 | 111–137 |
| Oct 31, 1:45 PM MDT | 114 | 2.99 | 111–137 |
| Oct 31, 12:45 PM MDT | 114 | 2.99 | 111–137 |
| Oct 31, 11:45 AM MDT | 111 | 2.98 | 111–137 |
| Oct 31, 10:45 AM MDT | 114 | 2.99 | 111–137 |
| Oct 31, 9:45 AM MDT | 114 | 2.99 | 111–137 |
| Oct 31, 8:45 AM MDT | 114 | 2.99 | 111–137 |
| Oct 31, 7:45 AM MDT | 114 | 2.99 | 111–137 |
| Oct 31, 6:45 AM MDT | 114 | 2.99 | 111–137 |
| Oct 31, 5:45 AM MDT | 114 | 2.99 | 111–137 |
| Oct 31, 4:45 AM MDT | 114 | 2.99 | 111–137 |
| Oct 31, 3:45 AM MDT | 114 | 2.99 | 111–137 |
| Oct 31, 2:45 AM MDT | 114 | 2.99 | 111–137 |
| Oct 31, 1:45 AM MDT | 112 | 2.98 | 111–137 |
| Oct 31, 12:45 AM MDT | 112 | 2.98 | 111–137 |
| Oct 30, 11:45 PM MDT | 112 | 2.98 | 110–140 |
| Oct 30, 10:45 PM MDT | 114 | 2.99 | 110–140 |
| Oct 30, 9:45 PM MDT | 114 | 2.99 | 110–140 |
| Oct 30, 8:45 PM MDT | 114 | 2.99 | 110–140 |
| Oct 30, 7:45 PM MDT | 114 | 2.99 | 110–140 |
| Oct 30, 6:45 PM MDT | 114 | 2.99 | 110–140 |
| Oct 30, 5:45 PM MDT | 114 | 2.99 | 110–140 |
| Oct 30, 4:45 PM MDT | 114 | 2.99 | 110–140 |
| Oct 30, 3:45 PM MDT | 114 | 2.99 | 110–140 |
| Oct 30, 2:45 PM MDT | 112 | 2.98 | 110–140 |
| Oct 30, 1:45 PM MDT | 112 | 2.98 | 110–140 |
| Oct 30, 12:45 PM MDT | 115 | 2.99 | 110–140 |
| Oct 30, 11:45 AM MDT | 115 | 2.99 | 110–140 |
| Oct 30, 10:45 AM MDT | 115 | 2.99 | 110–140 |
| Oct 30, 9:45 AM MDT | 109 | 2.97 | 110–140 |
| Oct 30, 8:45 AM MDT | 110 | 2.97 | 110–140 |
| Oct 30, 7:45 AM MDT | 110 | 2.97 | 110–140 |
| Oct 30, 6:45 AM MDT | 110 | 2.97 | 110–140 |
| Oct 30, 5:45 AM MDT | 110 | 2.97 | 110–140 |
| Oct 30, 4:45 AM MDT | 110 | 2.97 | 110–140 |
| Oct 30, 3:45 AM MDT | 107 | 2.96 | 110–140 |
| Oct 30, 2:45 AM MDT | 107 | 2.96 | 110–140 |
| Oct 30, 1:45 AM MDT | 110 | 2.97 | 110–140 |
| Oct 30, 12:45 AM MDT | 107 | 2.96 | 110–140 |
| Oct 29, 11:45 PM MDT | 107 | 2.96 | 111–140 |
| Oct 29, 10:45 PM MDT | 107 | 2.96 | 111–140 |
| Oct 29, 9:45 PM MDT | 110 | 2.97 | 111–140 |
| Oct 29, 8:45 PM MDT | 112 | 2.98 | 111–140 |
Map of USGS gauge 06019500 and the river around it
Where Ruby River above reservoir near Alder, MT sits, with 2 other gauges on the same river and our water's map point.
No current water-temperature reading at this gauge, so no temperature guidance is given. Take a stream thermometer: the trout lines Montana FWP uses are 66°F, 68°F and 73°F.
This gauge is on the same river as our page for , but no agency page we read lists its species.
Normal for Nov 5: 114–137 ft³/s (middle half of 86 years of record). Now: 108 ft³/s, below normal.
Below normal for this date. 108 ft³/s is between the 10th and 25th percentiles of daily mean flow for Nov 5 at this gauge over 86 years of record (1939–2025): 10th 105, 25th 114, median 127, 75th 137, 90th 152 ft³/s.
Daily means on record for Nov 5: lowest 92.5 ft³/s, highest 187 ft³/s.
Classes as USGS labels them (hyswap: flow categories (WDFN_stats schema) (U.S. Geological Survey) ); percentiles from the USGS daily statistics (U.S. Geological Survey) (approved daily means; the reading is provisional and instantaneous).
Steady over 24 hours (−2.7% discharge). Rising or falling means a change of more than 10% in discharge (or 0.2 ft of gauge height) over 24 hours; our rule of thumb, not a USGS class.
Turn Around Don't Drown. “A mere 6 inches of fast-moving flood water can knock over an adult.” No flow number makes a crossing safe; if in doubt, stay out.
Turn Around Don't Drown (National Weather Service)Guidance from the readings above and the published thresholds named with each line; not a fishing forecast, a safety guarantee or a statement about access. Local rules and closures come first.
NWS observed 2.98 ft stage, 104 ft³/s at Nov 5, 6:45 PM MST (NWS gauge RRRM8; its stage datum can differ from the USGS gauge height).
NWS has not set flood categories for this gauge.
Forecasts are not available. Only observed stages are available for this point.
Open the NWS gauge page · What the categories mean (National Weather Service)
Checked Nov 5, 7:55 PM MST; readings refresh at most every 15 minutes and statistics daily. Provisional USGS data can be revised. Conditions change: re-check before you go. This is general guidance, not a fishing forecast, a safety guarantee or a statement about access.