Ruby River Near Twin Bridges Mount

USGS Site No: 06023000 • Ruby River • Madison County, MT

Ruby River Near Twin Bridges Mount on the Ruby River is currently at 20 cfs (Very Low — 5th percentile for this date) . Gage height: 1.98 ft.

Reading from

↑ Upstream on Ruby River
Ruby River Below Reservoir Near Alder, Mount
20
CFS Discharge
1.98
Gage Height (ft)
Very Low
Flow Condition
N/A
Flood Status

Historical Percentile Comparison

Today's discharge compared to the long-term record for June 11 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.

Percentile Label CFS Threshold Today's Flow
10th Very Low threshold 43 Today: 20 cfs
25th Low threshold 94
50th (Median) Normal (median) 301
75th High threshold 601
95th Very High threshold 1,200

30-Day Hydrograph

Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.

1k 510 0 cfs Oct 16 May 28
10th–95th historical Day-of-year median Recent discharge

30-Day Flow History

Date Discharge (CFS) Gage Ht (ft)
May 28, 2026 30 —
May 27, 2026 37 —
May 26, 2026 37 —
May 25, 2026 26 —
May 24, 2026 22 —
May 23, 2026 30 —
May 22, 2026 34 —
May 21, 2026 34 —
May 20, 2026 45 —
May 19, 2026 60 —
May 18, 2026 61 —
May 17, 2026 55 —
May 16, 2026 40 —
May 15, 2026 18 —
Oct 31, 2025 162 —
Oct 30, 2025 164 —
Oct 29, 2025 168 —
Oct 28, 2025 170 —
Oct 27, 2025 172 —
Oct 26, 2025 168 —
Oct 25, 2025 162 —
Oct 24, 2025 163 —
Oct 23, 2025 166 —
Oct 22, 2025 169 —
Oct 21, 2025 173 —
Oct 20, 2025 180 —
Oct 19, 2025 170 —
Oct 18, 2025 162 —
Oct 17, 2025 171 —
Oct 16, 2025 176 —

Station Information

USGS Site No
06023000
State
MT
County
Madison County
Coordinates
45.5069, -112.3309
Drainage Area
970 mi²
Datum (ft)
4,670.0
HUC Code
10020003
View on USGS NWIS →

Recent Extremes

Max discharge
662 cfs
May 15, 2025
Min discharge
18 cfs
May 15, 2026

Computed from the local daily-values archive.

Nearby Gauges

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