Difficulty IV-V
Length 36.5 Miles
Flow Range 1.00 - 4.20 FT
Flow Rate as of: 19 minutes ago 1.72 [FT]
Reach Info Last Updated 07/10/2020 3:08 pm

River Description

Following the pioneering descent in 1971, Cal Giddings reported in the American Whitewater journal that “we feel we have uncovered a superb wilderness kayaking river.” The South Fork has stood the test of time as a great 2-3 day self-support trip in central Idaho. The put in is at the confluence where the Secesh River joins the South Fork Salmon River and the road ends. The trip can be combined with runs on the South Fork Salmon River, East Fork South Fork Salmon River, or Secesh River that all have access points along the forest road network in the basin.

The river changes dramatically with flow. At base flows it is an enjoyable Class III+ paddling trip with a few rapids that may be considered Class IV. During spring snowmelt the South Fork dishes out some of the biggest water around and is a committing Class V expedition. Expect huge waves and holes, many of which are unavoidable, stacked throughout the run. Medium flows provide an experience somewhere in the middle. Rafting descents of the South Fork are challenging and relatively rare although catarafts are an increasingly common sight. The river is largely the domain of self-support kayakers.   

The scenery on this run is spectacular. While much of the river flows through an Inventoried Roadless Area, ranches and small developments are scattered through the river corridor particularly in the vicinity of the one significant road crossing. Camping is great but sparse. To protect this incredible resource, paddlers must follow the rules on the permit page, and make every effort to follow leave-no-trace practices in the river corridor: park responsibly, camp on durable surfaces, and use fire pans and portable toilet systems so no ash or human waste is left behind. 

The run begins at the confluence where the Secesh joins the South Fork, with good dispersed camping just downstream of the confluence of the South Fork Salmon, East Fork South Fork Salmon, and Secesh Rivers. While remnants of an old road continue downstream from the put-in along river left for a few miles, this portion of the road beyond the Secesh River confluence has since been closed. Over the first 9 miles the river builds from class III to class IV. As you pass a waterfall entering the river on the left you are at the top of the rapid just above Devil Creek Rapid. Enjoy this rapid and then grab an eddy on the left for the scout. Devil Creek Rapid represents the first big test and has a couple of options depending on flow but avoiding the hole at the bottom on river left is key.

Just over 4 miles downstream of Devil Creek, where the river follows a bend around to the left, one can find a nice bench on river left with good camping and sites that can accommodate a few separate groups. It’s another mile downstream to Surprise and then Elk Creek Rapid that are part of a sequence of 3 rapids, with some big holes, that deserve a scout. It’s a short float from this point down to the South Fork Guard Station and a bridge across the river that is accessible off the Warren Wagon Road. This first half of the run from the Secesh down to the South Fork Guard Station has has over half a dozen major rapids, including the signature drops of Devil Creek, Surprise, and Elk Creek. At medium flows the rapids are generally 100-200 yard long boulder gardens with a total drop of 10-25’.

As you pass the South Fork Guard Station and float under the bridge, you will encounter more moderate whitewater and pass a couple miles of private cabins on river left. The river then enters a short canyon with some good whitewater before you arrive at the ranch at the confluence with Smith Creek on river left that is the last point along this middle segment of the river accessible from the Warren Wagon Road. At medium flows you will encounter plenty of great read-and-run class IV rapids continuing on down to Porphyry Creek where a trail bridge crosses the river 10 miles from the confluence with the Salmon River.

Over the next 6 miles downstream of Porphyry Creek the river drops 400 feet, with nine major rapids culminating in Fall Creek Rapid. This is a great section of whitewater through a scenic canyon. The rapids are noticeably bigger and more powerful as the river grows in size with the contribution of tributary streams along the way. The final test is Fall Creek Rapid, a rapid that is preceded by some great class IV that takes you right up to the horizon line. This final big drop is most easily scouted on the left but portaged on the right. The line involves navigating among large boulders and between, or through, the holes to the pool that awaits at the bottom.

As the canyon opens up over the next mile, a nice bench on river left has some good campsites. If you are planning to spend another night on the river before floating out on the Salmon River, good sites are available upstream of the pack bridge at Station Creek and the Badley Ranch on river left. 

Following a trip down the South Fork Salmon River, it’s another 20 miles down the Main Salmon River to reach the standard take-out at Vinegar Creek. You must obtain a permit to float out on the Salmon River from the Payette National Forest, but they are free and easy to get (no lottery required). Visit the permit page for more details. 


There are a few options for a put-in. You can drive the Warm Lake Road from Cascade (the turn is at Highway 55 mile 116.1). It's 24 miles on Warm Lake Road to the turn for the South Fork Road (FR 474) at Warm Lake Road mile 55.9 (on the way you will pass Trail Creek Hot Spring at Warm Lake Road 60.5, 0.1 mile up the hill west of the FR 409 junction). The South Fork Road (FR 474) parallels the river on river right along the upper reaches of the South Fork Salmon, providing the option to take advantage of alternate put-in locations. You can just follow the road down to the Secesh confluence put-in which is approximately 60 miles total driving from Cascade along a paved forest road.

You can also head to Yellow Pine (55 miles from Cascade over paved and dirt roads) and start your run on Johnson Creek (at the airport if considering a plane shuttle) or the East Fork South Fork.

Another option to access the put-in is to drive the Lick Creek Road which is a beautiful 35 mile drive (unpaved and may be snowed in early season) from McCall that follows the lower reaches of the Secesh River for the last few miles. 

For the take-out, most groups camp on the South Fork their last night and float out 20 miles on the Main Salmon to take outs at Vinegar Creek or Carey Creek accessible by road. Another option is to arrange a flight back to McCall or Yellow Pine from one of the private airstrips near the confluence of the South Fork Salmon River with the Main Salmon River. Inquire locally at the airport in McCall for charter options and details on the best airstrip to use. A Cessna 206 can typically fit two kayaks and two paddlers. Boats under 9' will be an easier fit.

Rapid Descriptions

Devil Creek Rapid

Class - V Mile - -27.5
Devil Creek Rapid is the first big test on the South Fork Salmon. River left provides a good vantage point for the scout. Depending on flows, there are options for the line. A large hole awaits on the bottom left that is best avoided. A portage on the right is possible if you have eddied out far enough upstream to get across.


Class - IV+ Mile - -22
Surprise is a fun class IV+ that marks the pending approach of Elk Creek rapid.

Elk Creek Rapid

Class - V Mile - -21.7
Elk Creek Rapid, at one time known as Teetering Log before the log was washed away in 1982, has a cliff along river left with a steep drop at its base.

South Fork Guard Station Road Bridge

Class - N/A Mile - -19.8
The bridge marks the approximate halfway point for the trip. Road access and cabins along river left extend for the next half dozen miles down to Smith Creek.

South Fork Salmon Trail Bridge at Porphyry Creek

Class - N/A Mile - -9.9
The South Fork Salmon Trail (#122) crossing marks the start of bigger drops at the end of the run. For the next 6 miles the river drops 400 feet and dishes up some incredible whitewater.

Fall Creek Rapid

Class - V Mile - -4.1
The biggest rapid on the run and the final test is Fall Creek Rapid. The drop is recognized by bigger midstream boulders (exposed at medium flows). The drop is easiest to scout on the left but the portage is on the right.


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Paul Diegel
1 month ago

Recently ran this in packrafts at about 2'and flew back to Krassel from Wilson Bar. Several short portages due to low water complications. Got a pretty severe scolding for walking thru Mackey Bar Ranch on the exit to Wilson Bar - there is apparently a hard-to-see fork in the legal FS trail 108 that stays on the hill above the ranch.

Gage Descriptions

At low flows around 2 feet this run is Class III/IV with Fall Creek Rapid being a solid IV.  At high flows the run is a very stout Class V big water run.  At According to Amaral's book it is IV-V difficulty at 4.2 feet and higher. (See his book for important insights and caveats about this gage!)

Directions Description

We have no additional detail on this route. Use the map below to calculate how to arrive to the main town from your zipcode.

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article main photo

Tell Us Why You Love the South Fork Salmon River!

Evan Stafford

The South Fork of the Salmon River in central Idaho is under threat from a massive mining proposal. As many of you know, the South Fork is a magnificent river with an incredibly wide range of whitewater opportunities on numerous stretches, including the East Fork, all the way through a Wilderness multi-day run that takes you to the confluence with the Salmon River at Mackey Bar on the Main Salmon wilderness run. We're collecting stories and photos of the South Fork for use in ours and our partners campaign to raise awareness about the imminent threat that this classic whitewater river faces. 

article main photo

Idaho Proposes Registration Fee for Non-Motorized Boats

John Gangemi

<?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />Idaho is proposing a $13 registration fee for non-motorized boats greater than 7 feet in length. Under this registration fee proposal all kayaks and rafts on Idaho waters would be required to have a registration sticker fixed to the bow of each boat greater than 7 feet in length. Stickers would not be transferable between boats. Out of state boaters would be required to comply as well.

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Can You Taste Victory?

American Whitewater

FERC revokes Preliminary Permit for
hydropower project on Boundary Creek in
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Kevin Colburn


Ryan Kinzer


Thomas O'Keefe


Morgan Giddings


Revision #Revision DateAuthorComment
1214891 05/08/20 Kevin Colburn updated description
1215423 07/07/20 Kevin Colburn updated image position
1214901 05/08/20 Kevin Colburn updated permit
1214889 05/08/20 Kevin Colburn updated description
1214890 05/08/20 Kevin Colburn updated permit
1214892 05/08/20 Kevin Colburn updated image position
1198459 10/25/10 Kevin Colburn photo, description, etc
1190415 02/07/04 Ryan Kinzer n/a
1198897 12/01/10 Thomas O'Keefe permit update
1203601 08/08/14 Thomas O'Keefe photo updated
1206820 08/06/18 Kevin Colburn permit
1215424 07/07/20 Thomas O'Keefe updated description
1215431 07/08/20 Thomas O'Keefe updated image position
1215432 07/08/20 Thomas O'Keefe updated image position
1215439 07/08/20 Morgan Giddings updated description
1215469 07/09/20 Thomas O'Keefe updated stats
1215472 07/10/20 Thomas O'Keefe updated description
1215473 07/10/20 Thomas O'Keefe updated description
1215474 07/10/20 Thomas O'Keefe updated description
1215475 07/10/20 Thomas O'Keefe updated description
1215492 07/10/20 Thomas O'Keefe updated name
1215497 07/10/20 Thomas O'Keefe updated image position
1215500 07/10/20 Thomas O'Keefe updated image position
1215501 07/10/20 Thomas O'Keefe updated description
1215503 07/10/20 Thomas O'Keefe updated description
1213149 07/02/19 Kevin Colburn updated image position