McKenzie, South Fork
Dutch Oven Camp to Cougar Reservoir (Slide Creek Day Use Area)(S. Fork McKenzie, South Fork McKenzie)
| Difficulty | III-IV |
| Length | 8.7 mi |
| Avg Gradient | n/a |
| Gauge | So Fk Mckenzie River Abv Cougar Lake Nr Rainbow or |
| Flow Rate as of 21 minutes | 317 cfsbelow recommended |
| Reach Info Last Updated | July 9, 2025 |
River Description
Despite a long season and relatively easy logistics this run has been overlooked by a lot of regional boaters for many years. Some of this avoidance has been justifiable as the upper portions of the run do have some knon wood hazards. Some of these hazards are natural, others are clearly the results of dubiously successful fish habitat projects from decades past. The lower South Fork McKenzie, below Cougar dam, has been the site of an incredibly successful 'Stage 0' restoration project that has created a massive spawning ground for spring chinook salmon. In the stretch above the reservoir, these wood projects from decades ago have been a navigational hazard and a barrier for some to come experience this place.
Another reason this run has been historically overlooked is because some of the best rapids have historically been hidden below the surface of Cougar reservoir. An operations change due to a lawsuit against the Army Corps of Engineers regarding their impacts upon native endangered fish has kept the reservoir level low in recent years. This change means the last few rapids are now exposed during most of the runnable season. Combine these quality rapids with access at French Pete Campground which is below the known wood hazards upstream, and the South Fork is having a bit of a renaissance.
As of 2025, the river is clear of wood from French Pete Campground and the exposed rapids under the prior reservoir level down to Slide Creek Campground. This section provides a great (albiet short) run with easy logistics and boatable flows well into May and early June. This run has a very wide boatable range and some enjoy rafting it at high flows, but hardshells, IK's and packrafts will have fun well into the low 400's on the gauge.
You can find a video of a low flow trip from 2025 on YouTube: https://www.youtube.com/watch?v=NOQTYus2SHE
Additional ReferencesFull description
...River Features
Put In
French Pete Campground Access
For a shorter run, and to avoid some of the known wood porgages upstream, put in is possible at French Pete Campground. There is a day use fee if you are not camping in the area.
Take Out (Slide Creek Day Use Area)
When the reservoir is low, takeout is on river right at the top of a very long, and dry, boat ramp at Slide Creek Day Use Area.
Trip Reports
Log in to add a reportThe upper South Fork McKenzie above Cougar Reservoir stays in quite a bit longer after many of the winter seasonal runs drop out. On this day we had a great low-medium flow that was plenty fluid for packrafts. The reservoir was low so we got some excellent rapids at the end of the run, and the hike out of the reservoir boat ramp was much easier than carrying hardshells. We put in at French Pete Campground and had a nice short run of a few miles after work. Note that the campground hosts do their jobs well, pay the day use fee which is $10 per car.