Big Muddy Adventures at Simpson Lake
Big Muddy Adventures at Simpson Lake is an SUP school and rentals in Valley Park.
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Outfitter details
- Disciplines
- Paddleboarding (SUP)
Rivers & creeks near this outfitter
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Typical flow by month
1997 to 2026
The water at Big Muddy Adventures at Simpson Lake typically runs highest in April, at a median 12 cfs, and lowest in October, at 2.4 cfs. The highest flow on record for any single day is 2,290 cfs, in 2025.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 5.9 | 3.3 to 12 | |
| February | 7.8 | 4.3 to 14 | |
| March | 10 | 6.1 to 20 | |
| April | 12 | 7.1 to 24 | |
| May | 11 | 6.0 to 26 | |
| June | 5.4 | 2.9 to 13 | |
| July | 3.8 | 2.0 to 9.9 | |
| August | 3.2 | 1.8 to 6.4 | |
| September | 2.6 | 1.4 to 5.3 | |
| October | 2.4 | 1.4 to 5.1 | |
| November | 4.0 | 2.1 to 9.4 | |
| December | 5.3 | 3.2 to 9.8 |
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 29 years of record. Statistics published by the US Geological Survey for Grand Glaize Creek near Valley Park, MO (site 07019185). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Current conditions
Streamflow
6.5 cfs
Normal (66th)
Water level
2.28 ft
High today
69°F
Wind
7 kt
Gusts 18 kt
Rain chance
2%
Week ahead
Forecast from Open-Meteo global models (NOAA & ECMWF).
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