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Salmon River, South Fork - idaho
20th of May
Streamflow 3160 cfs
Average cfs
Runnable Min cfs
Runnable Max cfs
Gradient 42 FPM
Length 52 Miles
Class III to V
Current Weather 64° Isolated Showers then Showers Likely


This class III to V journey is accessible from 3 different boat launch points along the Salmon River, South Fork. Paddlers should prepare for some fun paddling along this run. Streamflow levels and subsequent run conditions for Secesh To Main (The Canyon) are sourced from the nearby USGS streamflow gauge at Sf Salmon River Nr Krassel Ranger Station Id.

The South Fork of the Salmon is one of the best non-permitted multi-day trips in the country. At late summer flows (around 3' on the Krassel Gauge), it offers mostly a class III-IV experience with several solid class IV rapids. Above 4', it becomes a committing class V experience where swimming could be disastrous. Locals will run the stretch as high as it gets (often 7'+), but at these flows a guide is highly recommended. With scenery reminiscent of the Middle Fork of the Salmon, this run has it all. Weather on the river today will be isolated showers, then showers likely and possibly a thunderstorm after noon. mostly cloudy, with a high near 64. light and variable wind becoming south 8 to 13 mph in the afternoon. chance of precipitation is 60%.

Season Begins: May & Ends: August

Seasonal Flow Status: 39% Above Average

With a 3160cfs streamflow rate, Secesh To Main (The Canyon) is currently above its 2275cfs average seasonal streamflow for this time of year by 39%. Typically, this paddling destination has seen streamflow levels ranging between a low of 1200cfs in 2015, and a high of 3160cfs seen in 2019. Data for this report is sourced directly from USGS streamflow gauge 13310700

Hourly Forecast: 64° Today, Isolated Showers then Showers Likely

Over the course of the next 5 days, weather conditions on the river are expected to range between Showers. High near 44. South wind 5 to 7 mph becoming calm. Chance of precipitation is 100%. to isolated showers, then showers likely and possibly a thunderstorm after noon. mostly cloudy, with a high near 64. light and variable wind becoming south 8 to 13 mph in the afternoon. chance of precipitation is 60%. It doesn't look like there's any substantial snow forecasted this week with air temperatures ranging between 44° - 64°

Forecast Discussion

000 FXUS65 KBOI 161010 AFDBOI Area Forecast Discussion National Weather Service Boise ID 410 AM MDT Thu May 16 2019 .SHORT TERM...Today through Friday...Upper level trough is now moving onto the Northern CA coast this morning. Precipitation will move across SE Oregon this morning and across SW Idaho this afternoon as a strong cold front moves through. Expect isolated thunderstorms and gusty winds along the front. As the trough moves inland, this cold front will stall out over the Idaho zones and precipitation will continue through Friday evening. With the widespread precipitation, temperatures on Friday will be 15-20 degrees below normal across the Idaho zones and slightly warmer across SE Oregon. Total precipitation amounts of 1" to 2" are possible with this system. Snow levels will lower to 6000-6500ft by Friday morning and the highest peaks will see 6-12 inches of snow above 8000ft through Saturday morning. Saturday will generally be dry in between systems with temperatures around 10 degrees warmer than Friday. The next system arrives in SE Oregon on Saturday evening, and SW Idaho overnight into Sunday morning. Expect widespread precipitation on Sunday and temperatures around 15 degrees below normal. Significant precipitation amounts are possible Sunday and Monday. .LONG TERM...Sunday night through Thursday...Active conditions remain next week as a series of low pressure systems impact the forecast area. The first of these, already impacting the area on Sunday night, is expected to spin southeast towards the Four Corners region by Monday afternoon. Showers will remain with this system as it progresses eastward, especially across southwestern Idaho. A brief break is possible Monday night into Tuesday ahead of the next area of low pressure, which will be moving into the Pacific Northwest by Tuesday morning. Showers are favored through Thursday as this the core of this system shifts eastward through the forecast period. Models differ on where the core relocates, which influences anticipated shower coverage across the forecast area. Regardless, cool and wet conditions expected to persist through the long term. With this series of systems, temperatures are expected to remain generally 5 to 10 degrees below normal. && ...

Regional 5 Day Forecasts

Run Overview

Permitted Watercraft


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