Boulder River Near Boulder, Mount

USGS Site No: 06033000 • Boulder River • Jefferson County, MT

Boulder River Near Boulder, Mount on the Boulder River is currently at 150 cfs (Very High — 104th percentile for this date) . Gage height: 5.87 ft.

Reading from

Downstream on Boulder River ↓
Boulder River at Big Timber Mount
150
CFS Discharge
5.87
Gage Height (ft)
Very High
Flow Condition
N/A
Flood Status

Historical Percentile Comparison

Today's discharge compared to the long-term record for October 28 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 21
25th Low threshold 28
50th (Median) Normal (median) 36
75th High threshold 52
95th Very High threshold 80

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.

1.6k 815 0 cfs Apr 5 May 28
10th–95th historical Day-of-year median Recent discharge

30-Day Flow History

Date Discharge (CFS) Gage Ht (ft)
May 28, 2026 160 —
May 27, 2026 165 —
May 26, 2026 141 —
May 25, 2026 138 —
May 24, 2026 139 —
May 23, 2026 148 —
May 22, 2026 166 —
May 21, 2026 172 —
May 20, 2026 163 —
May 19, 2026 171 —
May 18, 2026 192 —
May 17, 2026 219 —
May 16, 2026 230 —
May 15, 2026 254 —
Apr 20, 2026 164 —
Apr 19, 2026 152 —
Apr 18, 2026 152 —
Apr 17, 2026 167 —
Apr 16, 2026 190 —
Apr 15, 2026 197 —
Apr 14, 2026 214 —
Apr 13, 2026 247 —
Apr 12, 2026 233 —
Apr 11, 2026 179 —
Apr 10, 2026 151 —
Apr 9, 2026 149 —
Apr 8, 2026 152 —
Apr 7, 2026 135 —
Apr 6, 2026 120 —
Apr 5, 2026 106 —

Station Information

USGS Site No
06033000
State
MT
County
Jefferson County
Coordinates
46.2110, -112.0917
Drainage Area
381 mi²
Datum (ft)
4,815.6
HUC Code
10020006
View on USGS NWIS →

Recent Extremes

Max discharge
568 cfs
May 15, 2025
Min discharge
16 cfs
Nov 30, 2025

Computed from the local daily-values archive.

Nearby Gauges

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