Rocky Mountain Paddleboard - Union Reservoir
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Around Rocky Mountain Paddleboard - Union Reservoir
- Carter Reservoir (Carter Lake)Recreation area15.6 mi (opens in a new tab)
- Flatiron ReservoirRecreation area16.9 mi (opens in a new tab)
- Pinewood LakeRecreation area18.1 mi (opens in a new tab)
- Two Ponds National Wildlife RefugeRecreation area23.1 mi (opens in a new tab)
- Horsetooth ReservoirRecreation area24.8 mi (opens in a new tab)
Before you go
Data Source: Recreation.gov · Source: USGS GNIS · Public land: USGS PAD-US
Typical flow by month
2013 to 2026
The water at Rocky Mountain Paddleboard - Union Reservoir typically runs highest in June, at a median 640 cfs, and lowest in September, at 89 cfs. The highest flow on record for any single day is 4,570 cfs, in 2015.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 98 | 81 to 118 |
| February | 98 | 81 to 128 |
| March | 102 | 80 to 154 |
| April | 109 | 80 to 202 |
| May | 379 | 183 to 620 |
| June | 640 | 414 to 1,004 |
| July | 113 | 89 to 238 |
| August | 98 | 81 to 128 |
| September | 89 | 71 to 127 |
| October | 99 | 81 to 157 |
| November | 111 | 93 to 153 |
| December | 109 | 87 to 140 |
Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 13 years of record. Statistics published by the US Geological Survey for ST Vrain CR below Boulder CR at Hwy 119 near Longmont (site 06730525). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Current conditions
Today · Fri
89Go/ 100
CloudyHigh 61°F, low 32°FRain 1%Wind 7 kt, gusts 10
Streamflow
44 cfs
Below normal (10th)
Water level
9.91 ft
Air quality
35 Good
Boulder Reservoir monitor, 19 km
National Weather ServiceBelow flood stage
Flood stage 15.5 ft. NWS reads 9.83 ft here.
Forecast from Open-Meteo global models (NOAA & ECMWF). Flood stages and forecasts: NOAA National Weather Service. Air quality: Colorado Department of Public Health and Environment via EPA AirNow. Preliminary data, not verified.
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