Big Muddy Adventures at Simpson Lake
Grand Glaize Creek near Big Muddy Adventures at Simpson Lake
About this river
Grand Glaize Creek is a 6.1 mile stream near Big Muddy Adventures at Simpson Lake in Missouri. Streamflow is measured at the USGS gauge Grand Glaize Creek near Valley Park, MO (site 07019185). The National Hydrography Dataset places it at stream order 4. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1997 to 2026
Grand Glaize Creek 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.
Boat access nearby
2 mapped launches sit in the mapped area of Grand Glaize Creek, all of them public access. Ramp data comes from the USGS national boat-ramp inventory.
- Simpson Park Lake (East)Simpson Park LakePublic
- Simpson Park Lake (West)Simpson Park LakePublic
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Grand Glaize Creek's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
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