About this river
Arkansas River is a 29.2 mile river near Rocky Mountain Outdoor Center in Colorado. Streamflow is measured at the USGS gauge Arkansas River near Nathrop, CO (site 07091200). The National Hydrography Dataset places it at stream order 8. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1965 to 2025
Arkansas River typically runs highest in June, at a median 1,855 cfs, and lowest in February, at 208 cfs. The highest flow on record for any single day is 5,470 cfs, in 1995.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 218 | 190 to 278 | |
| February | 208 | 185 to 290 | |
| March | 214 | 181 to 302 | |
| April | 283 | 229 to 367 | |
| May | 750 | 477 to 1,010 | |
| June | 1,855 | 1,315 to 2,660 | |
| July | 1,080 | 736 to 1,530 | |
| August | 684 | 584 to 918 | |
| September | 347 | 293 to 432 | |
| October | 293 | 249 to 365 | |
| November | 296 | 253 to 346 | |
| December | 241 | 208 to 293 |
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 55 years of record. Statistics published by the US Geological Survey for Arkansas River near Nathrop, CO (site 07091200). 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 Arkansas River'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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