Difficulty III-IV
Length 6.5 Miles
Flow Range 400 - 5000 CFS
Flow Rate as of: 56 minutes ago 1550 [CFS]
Reach Info Last Updated 12/10/2019 1:43 am

River Description

This section is enjoyable at a wide range of flows.  It has been run down to 200 cfs, but most people prefer it with over 800 cfs.   The run is most difficult in its teens (1300-1900 cfs) and turns more playful above 2,000.  The riverbed is dynamic, with rapids changing during every flood.

This is an incredible piece of river flowing through a beautiful gorge right at Portland's doorstep. In October 2002 American Whitewater signed the Settlement Agreement resulting in the removal of Marmot Dam in 2007 and restoration of this river for fish, wildlife, and recreation. We are continuing to work with our partners to realize the full potential of this spectacular river as Bureau of Land Management develops the management plan for lands previously owned by Portland General Electric that have been transferred to public ownership. This is a great run but it's a good idea to get recent beta from the locals as there are a couple spots where log hazards can create issues.

From the Marmot Dam site the river flows through straight forward whitewater until you come to '64 Logjam where remnants of an old log jam still stick up from the channel and can collect additional debris.  Scout right.  More runnable at higher flows, the logjam is often portaged on the cobble bar on the right at low water.  Stay attentive for wood on the entire run as the situation changes from day to day especially when flows are bouncing around.

There are several possible put-in locations.  Some boaters launch downstream from the log jam by parking at the first large pullout on the right when Big Sandy Dam Road levels out.  Be prepared to rope boats down a short steep section of trail.  If you continue driving to the next major pull-out (after the gate which stays open, identifiable by the concrete blocks) there is an old road down to several short trails that access the water above the log jam by ~1/4 mile.  If you drive all the way to the end of Big Sandy Dam Road there is a gated park, open only in summer, that has facilities and adds about a mile of enjoyable class III to the run.   Do not park outside the gate and attempt to reach the river; it's too far.  Instead drive back on the road to one of the pullouts mentioned above.

When the river disappears into a magical gorge with hanging gardens that drape down the sides of the bedrock walls, you are at Boulder Rapid.   This rapid is full of undercuts and sieves, and the slots on the right collect wood.

You have a couple options (either down the left or the right) depending on flows, the current wood situation, and your comfort level.  Boulder is difficult to scout.  To see the right channels you can climb up on the river right cliff.  These lines are rarely run, often obstructed by wood, and always complicated by nasty sieves.  To see the left channel (most often run) you can land in the boulders on the left but then you can't really run the rapid from there.  At very low water a gravel bar appears upstream from the giant Boulder and becomes the best scouting spot for the regular line.  The very farthest left slot is the hardboat sneak.  It is very narrow (not for rafts), totally blind and underneath the cliff wall, but it is relatively easy and low risk.  If you get in there and run out of water, you can get out and drag.  From this sneak you will be launching from the river left eddy downstream from the first (main) drop, and above the easier bottom drop.

Rasp Rock is the next significant rapid where the river rushes over boulders with some holes you'll have to negotiate. The river narrows down here and wood catches on the center left rocks at the bottom.  The standard line is to cut right behind the bottom right boulder.  The giant hole that used to form here at high flows has not been seen much in recent years as the rocks have moved.

Drain Hole comes up next and if it's your first run, or if it's lower water than you've seen, it's worth a scout.  Scout left if you think you might run it, because you get the best view of the rapid.  For those who already know their line, you can see most of the rapid and check for wood from the last eddy on the left.  

The portage is on the right. After a small pool upstream of the rapid the water accelerates down a steep ramp on the left and banks to the right across a line of giant boulders which catch woody debris on a regular basis.  Most lines involve ways of hitting the right eddy below the ramp and before the line of boulders.  The best exit slot is far right, door #4.

You will recognize Revenue Rapid by the bridge coming into view. Be warned that the rapid is much bigger than it looks from the bridge.  It is a two part rapid with a messy boulder pile at the top and then a big water finish with a hole bottom right.  The boulder pile often collects wood, so scout from left or right (or both) to detect blockages.  You really can't see the routes from shore, so the best way to find a route is follow someone who has been there recently.  This rapid is constantly changing.  As of Dec 2019 there are three routes through the rocky top part: left to right known as the Dog Leg (for a left to right move), the Straight Shot (where rafts can get through at 1500 and more) and the Far Right.  Each line is optimal at a different flow.  After the rocky top part the water slams into the right wall, and then there are eddies on the left above the big water bottom part.

After Revenue rapid the take-out comes up immediately on river left, either upstream or downstream of the bridge.  Climb up to the road via trails beside the bridge on either side and be courteous to locals as there have been hostilities.  Carry your boats up to the parking area at the junction of Kubitz Ave and do not park or load up at the junction of Dusty Lane.  Do not get naked or urinate in public here.


From Highway 26 in Sandy turn north onto Ten Eyck Rd. Follow this road 1.9 miles down into the Sandy gorge and the Revenue Bridge. This bridge is the take-out where a trail leads up from the river on the downstream river left side. Parking is extremely limited and local landowners have complained about the congestion--plan to meet and consolidate vehicles somewhere in the town of Sandy and be quick and efficient with your load and unload. Don't block driveways or tear up the shoulder. A few parking spots are available by heading back up the hill a few hundred yards to the intersection of Ten Eyck Road with Kubitz Road.

To reach the put-in continue on Ten Eyck Rd. another 0.2 mile and turn right onto SE Marmot Rd. Head 4.1 miles to the BLM access road at 48770 SE Marmot Rd. Turn right onto this road and head down the hill to one of several possible launch spots.  It's 1.3 miles down to where the road levels and the first pullout on the right is where you can access the river downstream from the logjam.  Cross the gully and drop down to the left to get to the water.  The second pullout on the right where the concrete blocks are is also used by following the road down to one of several trails that head off to the right and down to the water.  Continue to the end of the road for the full run but if the BLM gate is closed, backtrack to one of the pullouts to find a launch spot.   BLM has been working on site management and access and the last segment of the road is gated during the off-season making other access points more desirable.

Additional Information:

Some pretty but outdated photos are available on the Sandy River Gorge page on Jason Rackley's Oregon Kayaking site.  Rasp Rock has changed a lot since then.

Rapid Descriptions


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Teresa Gryder
1 year ago

It is still advisable for groups to rendezvous in Sandy (at the Safeway or similar) to consolidate into the minimum number of vehicles and change into boating garb, in order to minimize time spent and nudity at the takeout parking area at the mouth of Kubitz road.

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Robert Cruser
2 years ago

Ran it for the first time after last month's high-water event and found that the wood situation noted in August has changed generally for the better. The wood on the left-side of Boulder is gone, as is the wood at the top of the middle chute at Upper Revenue. The "skinny chute" at the cave a few drops above Boulder may still have wood in it, but we couldn't tell for sure. However, there is now a very easy slot just to the right of it, which I would recommend unless you know for sure that far left is wood-free. At Drain Hole, there are a couple of logs criss-crossed vertically at 45 degree angles between the middle and right boulders. We had a swimmer here today, and at this flow, he was able to kick-off the bigger one that sits in the current running along the boulders but this could become very dangerous at higher flows, so take a good look at it before committing.

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Robert Cruser
2 years ago

Ran this on August 19, 2017 and discovered multiple wood issues. They've obviously been there awhile but haven't seen them documented and they are significant. Rapid with the cave on the left a few drops above Boulder has wood solidly planted in the skinny left chute forcing a portage at low water. Wood is spanning the center chute at Boulder at the undercut, and the right chute looks worse than ever. Big chunk blocking the normal entrance to the regular middle run at Upper Revenue. Upper Revenue too low to run now anyway, and looks like some high water will likely move it along.

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Teresa Gryder
2 years ago

Neighbor Relations at Takeout: Paddlers' right to take out here is embattled as of the end of 2016. Build friendly human connections when possible. The best takeout parking area is at the intersection of Kubitz and Ten Eyck. Please refrain from aggravating the situation. Change and urinate in private. Park closely to avoid the need to spread out down Kubitz Road. Avoid turning around in their driveways. Avoid worsening the mudhole on the uphill side of Kubitz Road (the takeout parking intersection). Do not park or load on Dusty Lane. If the water is high enough, consider taking out at Dodge Park instead.

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Ben Hayes
9 years ago

To find the put in take Hwy 26 west through Sandy. At the last traffic light in Sandy take a left down OR 211 (?) towards Bull Run. The take-out is at Revenue Bridge, however due to landowner issues it is best to park about 100 yds before the bridge on a road that turns off to the left. After a lovely discussion (mostly about the aforementioned barista), the 4 of us crammed into the cab of Mike’s pickup truck and headed off upstream. Our original plan was to put-in above Alder Creek, however after 20 minutes of drysuit stench in the cab of the truck and no-sign of a good put-in, with the guidebook locked in my car at the takeout, we decided to settle for the put-in at the Marmot Dam site. From Revenue Bridge continue on OR 211. The first right is Marmot Rd., take that until a dirt road takes off on the right with lots of big official signs. The road winds down to a locked gate. At this point we decided that the easiest way to the river was down. After some sliding on a muddy slope, the kind of place where it is far to easy to imagine serial killers dumping bodies off of the dirt bank. We just about dumped Dave, and his boat, off the bank, however a sort of sketchy belay later, and Dave had made it to the river. The other 3 of us decided that we did not in fact want to die by falling off of a dirt cliff on the Sandy River, so we made our way back up the road and continued walking down to just below the dam site where we found an easy put-in. The first couple miles of the river are easy class II with one woody class III that is worth scouting on the right, you can see giant logs sticking out of the river from upstream. Continuing downstream you head into a fun little gorge section with a few class III rapids and some lovely overhanging caves. We made it past Sasquatch and his cohorts and had fun through Boulder, the first class IV of the run. At the level we ran it at, the line was just to the left of the biggest boulder, winding down through some other rocks. Next was Rasp Rock where there’s a big hole that you might want to paddle hard into. Half the group went right, the other half went left, and we all survived so that just goes to show (?) We continued down to Drain Hole, a tight right turn with a big sieve on the left, a move that looks hard but actually has a huge pillow on the sieve. The final rapid is Revenue Bridge, a fun, but quite rocky rapid that is much bigger than it looks from the bridge. We ran far right down the top section, then left at the bottom, skirting (or getting chundered in) some quite large holes. The takeout is on the left at the bridge. more pictures can be found at http://cohophotography.com/sandygorge/

Gage Descriptions

The Sandy at Marmot gauge is immediately above the launch point and is becoming more consistently accurate by the year as the sediment from the breached dam distributes.  The riverbed is very dynamic so after each major flood event the gauge may read differently for the same flow.

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.

Date Flow Result Factor  
2019-09-20 High Near Miss/Rescue Poor Planning Read More
1995-05-13 n/a Near Miss/Rescue Poor Group / Scene Management Read More
1988-03-20 Medium Fatality Other Read More



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Thomas O'Keefe


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Teresa Gryder


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Revision #Revision DateAuthorComment
1196591 11/20/09 Thomas O'Keefe gauge update
1191339 07/08/06 n/a n/a
1213979 12/10/19 Teresa Gryder updated description
1213980 12/10/19 Teresa Gryder updated description
1213981 12/10/19 Teresa Gryder updated description
1197386 03/13/10 Thomas O'Keefe copy edits
1211381 03/09/19 Teresa Gryder updated image position
1198650 11/13/10 Thomas O'Keefe copy edits
1205278 10/05/15 Thomas O'Keefe minor edits
1210413 10/09/18 Jacob Cruser
1210809 01/07/19 Teresa Gryder Updated description.
1210412 10/09/18 Jacob Cruser
1206424 05/15/16 Thomas O'Keefe minor edits
1210810 01/07/19 Teresa Gryder added a note about Revenue's structure
1212693 06/04/19 Teresa Gryder updated image position
1211850 04/04/19 Teresa Gryder updated image position