About this river
Onahu Creek is a 2.5 mile stream near Grand Lake Marina & Boater's Choice in Colorado. Streamflow is measured at the USGS gauge Colorado River below Baker Gulch near Grand Lake, CO (site 09010500). The National Hydrography Dataset places it at stream order 4. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1953 to 2026
Onahu Creek typically runs highest in June, at a median 290 cfs, and lowest in February, at 7.8 cfs. The highest flow on record for any single day is 1,770 cfs, in 2011.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 8.4 | 6.7 to 10 | |
| February | 7.8 | 6.2 to 8.8 | |
| March | 8.0 | 6.2 to 9.7 | |
| April | 22 | 12 to 33 | |
| May | 151 | 100 to 220 | |
| June | 290 | 171 to 468 | |
| July | 66 | 42 to 113 | |
| August | 27 | 21 to 36 | |
| September | 21 | 16 to 30 | |
| October | 20 | 15 to 29 | |
| November | 14 | 11 to 19 | |
| December | 10 | 7.8 to 13 |
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 73 years of record. Statistics published by the US Geological Survey for Colorado River below Baker Gulch near Grand Lake, CO (site 09010500). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Onahu 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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