Difficulty IV-V(V+)
Length 0 Miles
Flow Range 150 - 350 CFS
Flow Rate as of: 1 hour ago 4.38 [CFS] ℹ️
Reach Info Last Updated 09/16/2019 3:45 pm

River Description

With the new Merced River plan adopted in 2014, boaters can register and get wilderness permits to run the Headwaters of the Merced through Little Yosemite Valley.

There is no easy access, so boaters will probably have to hike upstream from Yosemite Valley. No boating is aloud below Little Yosemite Valley to the Main Yosemite valley floor. There are a number of access trails that each have their pros and cons. Research will need to be done beforehand to pick your route.

Boaters must obtain Wilderness permits and register to boat this section.

The Wilderness permits are difficult to get for this area, do research on ways to increase your chances before driving to Yosemite Valley. Wilderness permits must be obtain the day before your trip, the office opens at 11AM but hikers recommend arriving as early as possible (some say as early as 3AM, one group of kayakers got theirs by arriving at 9:30AM). These can be difficult to get as they limit the number of groups per day. The cost was $30 to enter the park and the permit was free. Permits allow for more than enough days in the park to kayak the river (3 nights is the minimum you should request).

Whichever permit you get, plan on hiking around 15 miles to reach your put in. Some will choose to break this hike up into two days, with the option to add some paddling on the second day. At the end of the trip, there is a mandatory 4 mile hike out around Nevada and Vernal Falls down to the valley floor.

The Merced headwaters run is split into two sections by Merced Lake, and how much of this stretch is run is likely determined by which permit you can acquire. If you have a permit that requires hiking in from Glacier Point or Happy Isles, it makes the most sense to paddle from Merced Lake down. This stretch has the most bang for your buck, but misses out on some of the rapids upstream of Merced Lake. If your permit has you hiking in from Tenaya Lake or using the Rafferty trail, adding the sections above Merced Lake may be more appealing. Either way, you will exit through Little Yosemite Valley and have a 4 mile hike down to the valley floor at the end of the trip. There are shuttle buses available to return you from the valley floor to the trailheads, but these do fill up. Consider reserving a spot in advance.


             Lyell Fork into Merced Lake


The Upper section starts near the Lyell Fork confluence at a foot bridge. From here there is a few hundred yards of floating before the first slides, where a small ledge proceeds a set of three rapids. The second of these rapids has a log duck followed by some smooth slides, and the third piles into the left wall.

The first large rapid of the run is a short ways downstream, named Blazing White Sun Fire. This slide to falls has been run starting on the left and moving to the right, but be wary of the bounce at the lip and the rocks in the landing.
  Between here and Washburn Lake there are a couple of fun, unique bedrock rapids separated by flat water floating. The largest of these is a beautiful 9 foot vertical drop where you duck under an old log.

The first gorge below Washburn Lake starts with a series of mellow slides that ramp up for a bit before the river pinches down at Tuck and Weave. Tuck and weave is a significant pocket rapid proceeded by some log ducks.

Some mellow floating leads into the Asylum, an area where the river splits into two channels, both of which are V+/VI. Just above the split, the river drops over a sketchy 12 footer, then a friendly slide. Just below the slide is the split, where the right side enters an unrunnable cascade and the left side roars through some messy Toxaway esque cascades as well. The first slide in the left channel is high risk and the second is not runnable.  The entire Asylum can be portaged easily via the trail, putting back in just below the reconsolidation of the two channels.

There is some more mellow floating below here, down to a small ledge at a horse gate. Downstream of here there is a TON of wood all the way down to the gorge above Merced Lake. You can either continue and play the over/under game or portage this section along the trail, down into the campground. It is so beautiful in here that you will hardly notice the extra work.

The Gorge just above Merced Lake has been christened Gorge Lucas. Merced Lake separates the upper stretch from the lower section.


Merced Lake through Little Yosemite Valley


Some may choose to only run this section, it means less hiking with gear and may have the best “bang for your buck”, though it misses the rapids above Merced Lake. If this section is all that your group desires and you are able to acquire the correct permit (Glacier Point or Happy Isles to Little Yosemite Valley) it is possible to hike 8 miles and camp at the base of Moraine Dome, next to the final cascade the first night. This makes it possible to leave overnight gear at camp and finish the hike the next day with lighter packs. Take note that to leave overnight gear you must either have a bear bin or camp at Merced Lake.

There are two gorges in this section that don’t allow for conventional portaging once entered, these can both be scouted on the hike up if you come through Little Yosemite Valley (as opposed to hiking in from above on the Clouds Rest or Rafferty trails). These gorges can be portaged in their entirety on the trail. In this section there are 3 slides around 50’ tall that are smooth and fun.  At high flows the seriousness of these drops increase.  If in doubt, paddle the left side of any islands for the cleanest route. While usually only class III, they can be rocky and may have wood.

There are 3 main gorges below Merced Lake, the one exiting Merced Lake has a high fun factor and is named Echo Gorge. If there are any planes flying overhead or thunderstorms passing through while you are in the area you will know why. Echo Gorge was not locked in; starting and ending with large, smooth slides.  The rest of the gorge between these two slides had a class IV+ ish feel and contained numerous 5-15 foot ledge/slides. 

Below Echo Gorge was an island, then you pass through the congenial Lost Valley of the Merced. A foot bridge at the end of this valley marks the start of the most difficult and longest gorge. Storm Warning is the set of three rapids below the foot bridge. All of these are runnable, but can be portaged along the trail, or at river level with varying degrees of difficulty. At the end of Storm Warning is a pool as the river turns right, the trail is easily attainable from here if it is decided you will not run the gorge.  If you choose to run the gorge, make sure you are comfortable with the exit move at Hard Twist before committing yourself to this section. The main gorge starts with a series of slides containing a sticky hole that can be portaged on the left, followed by a set of boulder rapids as the Merced nears the heart of the gorge. This gorge comes to a crux at Sphynx's Gate, where the gorge walls rise vertically and commit boaters to what is downstream. Egress is possible on river left just before Sphynx’s Gate, where a serious hole with limited safety options awaits. One more twisting rapid lies between Sphynx’s Gate and the exit rapid in the gorge (Hard Twist). Hard Twist is a two part rapid.  First a difficult bedrock falls with an eddy that must be caught on the right, then an as of yet unrun pile of boulders which pinches violently into a crack. After catching the eddy below the first part of Hard Twist, a friction climb is required along the river right wall around the second part.

As the trail meets up with the river below Hard Twist, the river enters a straight away full of boulder rapids that can be scouted from the trail on the left or the bank on the right. Be sure to scout thoroughly for wood. The boulder gardens end just above Paradise Slide, a two part low angle slide just above a possible camp site at an island. This campsite is up and to the right from the end of this pool.

Just downstream of the Island is a set of three rapids. The first is a sieved out slot which is runnable, but best portaged left. The second is a fun 10 foot boof off an arrow shaped rock, and the third is a boof onto a slide where a dangerous pocket awaits those who fail to get right.

Around the corner is a ledgy rapid with a couple of necessary eddies before “Fear”, a difficult triple drop without conventional safety options. Running Fear lands paddlers in Bunnell Gorge, where a trickier than it looks boulder garden and small ledge lead into the Bunnell Cascade. Scout the entire gorge from the trail before entering.  Bunnell Cascade is one of the signature drops on the run, a ten foot ledge landing on a fifty foot slide best run hard left at the top. It is possible to portage the gorge and still run the Cascade.

After Bunnell is another island that can collect wood, then a class III-IV section above the final Cascade at camp. This final cascade near the campsite has a small rapid leading into it, the river then flows over an ultra smooth and fast, 50 foot tall slide. The best line is just to the right of an obvious rooster tail near the top, its an easy walk up on river right to do it again! The campsite exists just below this drop on river right.

Exiting the pool below the campsite Cascade, take the left channel which will lead to Little Yosemite Valley. There a couple miles of flat water floating with major scenery points and a few log portages before ending the paddling portion of the trip just before the whitewater picks up again and enters a gorge that is off limits to paddlers. At this point load up and begin your hike out, it is not legal to paddle any portion of the river from here to the Yosemite Valley.

The John Muir trail is highly recommended over the Mist trail for kayakers with backpack systems.

Other sources of information:

Wilderness Permit System

into the outside

Trail info and trail map



The slides can be run higher than the gorges, so the gorges are the limiting factor. However, if you are alright portaging the gorges slightly higher runs can be done.

420 is on the high side of good for the lower gorges but made the top sections excellent, 350 is pushy but everything goes and 250 was a nice, friendly level.  The bottom of the flow range has not been sorted out, but it appeared runnable at 150 cfs.



Rapid Descriptions


Gage Descriptions

The gauge is at Happy Isles below Illouette Creek, so flows at the put in will be lower when Illouette Creek is flowing.

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.

No Accident Reports



article main photo

Merced in Yosemite–Officially Open at Last!!

Megan Hooker

On Friday, April 24, 2015, the Merced River in Yosemite National Park was officially reopened to paddlers! Even though the new Wild and Scenic River Plan was finalized a year ago, the actual rules and regulations for the Park were finally updated on Friday. This marks the culmination of seven years of sustained engagement by American Whitewater with the National Park Service and other stakeholders. 
article main photo

Yosemite National Park Releases Final Merced River Plan

Megan Hooker

Earlier today, Yosemite National Park released their Merced Wild and Scenic Final Comprehensive Management Plan and Environmental Impact Statement. The new plan places paddling on equal footing with other activities in the Park, and we're very pleased to announce that the Park Service has improved and enhanced opportunities to enjoy Yosemite via kayak, canoe and raft.


Jacob Cruser


Paul Martzen


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1203114 02/26/14 Paul Martzen n/a
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1213648 09/16/19 Jacob Cruser updated description
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1212975 06/19/19 Jacob Cruser updated image position