Its ideal streamflow range is between 300-800 cfs, which is typically during the spring runoff season from late May to early June. The river is rated as a Class II-III, with some sections reaching Class IV during higher flows.
The segment mileage of the San Rafael River run is divided into three sections: the upper section which is 3 miles long, the middle section which is 15 miles long, and the lower section which is 8 miles long. Each section offers a different level of difficulty and scenery. Some specific river rapids and obstacles include Rockfall Rapid, Black Box Rapid, and Swasey's Leap.
There are specific regulations to the area that include respecting private property, packing out all trash, and following Leave No Trace principles. Additionally, there are restrictions on the use of motorized vehicles in certain areas and on camping in designated areas only.
| Last Updated | |
| River Levels | 0 cfs (2.35 ft) |
| Percent of Normal | +100% |
| Optimal Range | 300-800 cfs |
| Status | Too Low |
| Class Level | ii-iii |
| Elevation | ft |
| Streamflow Discharge | cfs |
| Gauge Height | ft |
| Reporting Streamgage | USGS 09327000 |