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The Tunnel Run section of the American River in California is a Class III-IV river run, with a total distance of 7.5 miles from Ralston Powerhouse to Greenwood. This section features a number of challenging rapids, including the infamous "Tunnel Chute" and "Chamberlin Falls." It is best to float this section in the spring months, when the snowmelt provides enough water flow to make the rapids more manageable. The recommended flow for this section is between 1,000 and 2,000 cfs. It is important for rafters and kayakers to be experienced and skilled in navigating Class III-IV rapids, as the Tunnel Run section can be dangerous for beginners.
| Last Updated | 2023-06-13 |
| River Levels | 1390 cfs (1.86 ft) |
| Percent of Normal | 200% |
| Optimal Range | 700-3000 cfs |
| Status | Too Low |
| Class Level | IV- to IV |
| Elevation | 717 ft |
| Run Length | 16.5 Mi |
| Gradient | 23 FPM |
| Streamflow Discharge | 338 cfs |
| Gauge Height | 0.9 ft |
| Reporting Streamgage | USGS 11427000 |
Weather Forecast
Nearby Streamflow Levels
| Discharge | Stage | Elevation | |
|
DEER C NR CAMERON PARK CA
2011-06-30T23:45:00.000-07:00 |
8cfs | 3.60ft | 779ft |
|
DRY C A VERNON ST BRIDGE A ROSEVILLE CA
2012-04-01T23:45:00.000-07:00 |
159cfs | 10.30ft | 124ft |
|
AMERICAN R A FAIR OAKS CA
2024-12-21T00:00:00.000-08:00 |
2050cfs | 6.74ft | 79ft |
|
COSUMNES R A MICHIGAN BAR CA
2024-12-19T00:30:00.000-08:00 |
112cfs | 3.29ft | 180ft |
|
ARCADE C NR DEL PASO HEIGHTS CA
2024-12-19T02:00:00.000-08:00 |
4cfs | 2.4ft | 54ft |
|
MORRISON C NR SACRAMENTO CA
2017-11-29T01:00:00.000-08:00 |
11cfs | 2.25ft | 23ft |
|
LAGUNA C NR ELK GROVE CA
2018-10-23T02:30:00.000-07:00 |
1cfs | 2.96ft | 55ft |
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