Muliwai and Waimanu Valley Trail is a 15.1 mile lightly trafficked out and back trail located near Honokaa, Hawaii that features a waterfall and is only recommended for very experienced adventurers. The trail offers a number of activity options and is accessible year-round.

15.1 miles
5,226 feet
Out & Back




nature trips









over grown



no dogs

Directions from Makapala: Highway 240 leads off Highway 19 at Honokaa to the eastern edge of Waipio Valley. A steep, four wheel drive road extends from the lookout down into the valley. Upon reaching the valley floor, take the road to the right, then follow the beach to Wailoa Stream. The road ends at the stream. Ford the stream and follow the horse trail on the dunes to the west side of Waipio Valley and the beginning of the trail.

2 days ago

Beautiful jungle with a variety of trees at different elevations. Secluded beach and great valley/waterfall views at the end. As in the other reviews lots of mosquitos, not bad if you are able to keep a pace. I wasn't quite fast enough :/ They won't bother you at the camp site near the ocean though. I found the waves crashing hard to sleep to, they are not small soothing waves, rather large and thunderous - bring some earplugs if that will be an issue for you. Cross the first creek/river at the sandbar about 300 ft up from the ocean, it's wider here but not as deep (this may change over time). Oh and pack everything in waterproof bags, I didn't and came close to falling in at the last stream (near the camp site) which would have ruined the trip. Also be aware of the water level of the stream in the valley if it is raining - a couple hiking out told me they woke up to their belongings being swept away (think this was campsite 2). Also the reviews saying it is difficult are telling the truth. Have fun!

21 days ago

Gorgeous and rewarding hike, but it makes you work for it! The initial ascent from Waipi’o Valley is relentless- extremely steep, overgrown and lots of mosquitoes and spiderwebs. But once you see the pine needles on the ground, you’re near the top and in for a lovely hike.

The trail alternates up and down between pine forests and misty jungle, with many delightful creek crossings and majestic trees. Bring mosquito defense- you’ll thank yourself. It was also quite muddy being the rainy season (October). The entire middle section is beautiful and mysterious... enjoy.

With a snack break, it took us just under 6 hours to get to Waimanu Valley. The descent into Waimanu was more worrisome than Waipi’o. It’s comically steep, slippery, and overgrown, so watch your step (and for pig poop! We saw two wild pigs in the distance on the trail). But the views into Waimanu are stunning and magical. Would do this hike again!

2 months ago

Steep. But so, so worth it!

3 months ago

3 months ago

Fantastic. But beware, the final downslope (on each end) is very steep, slippery, and hard on the knees...but worth it!
We camped for 3 nights which was the perfect amount of time. I suggest packing something to sit on as the rocks get uncomfortable pretty quickly!

3 months ago

Hard hike but totally worth it. Best advice is to pack light.

5 months ago

Native Coloradan, climbed many 14ers, trail racer, mountain biker, blah, blah, blah....That said....This is not an easy trail, don't fool yourself. There is no flat, always up or down, and often steep. The weather changes very quickly and a wet or muddy trail could be seriously hazardous or fatal. You will be climbing the sides of cliffs, crossing water, and experiencing constant elevation change. If you start at Waipio Valley Artworks, the total distance is closer to 10 miles. It will rain, it may be hard to start a campfire, be prepared. You will sweat and smell like an ox, hydration is critical. The good news is there is plenty of water. Filter and / or treat and there's plenty to drink. The bad news is there are times of sun exposure that will turn your mouth into a dragons toilet. The hike out of Waipio Valley on the Z Trail is steep but not a lotta risk of falling off the edge because of the berms and vegetation. In many places though, you may as well be climbing stairs, it's that steep. Start early because, the sun. Once on top it's up and down, at least 8 water crossings, potentially as many as 11 if it's been raining. The hike down into Waimanu is steep, with a couple of narrow trail sections that when wet, are spooky, a wood off camber bridge is even spookier. The trail is full of mischievous little rocks that like to jump under your shoes when you're not looking. Lotsa slipping and sliding in the mud and leaves. Why do it? The valley is stunning, the beach is amazing; stay two nights and relax, it's worth it. But keep in mind, if the trail were a ski slope it's a black diamond. It can &%$# you up...

5 months ago

One of the most challenging yet rewarding hikes on the big island. Most local Hawaiians have never seen the valley. Definitely have to leave a piece of yourself on the trail.

6 months ago

worth every step...

7 months ago

A hard and beautiful hike. I would not suggest this as a day trip in and out to anyone other than a really serious athlete. Also, so lovely at the end, why not stay a night? My perspective-Although an active person and in medium shape, I don’t do cardio (not a runner or really... anything other than climbing and light hiking) so this hike was challenging for me! By the end of the hike in, my calves and knees were jello. The “z trail” section as well as the last half mile are challenging, but the middle, although more flat, is a series of 10 descents/ascents. The trail is muddy of the “gushy” variety at least 30% of the time. Other times it is less gushy but muddy, sometimes very slippery, and occasionally lovely pine needles. The initial z trail going up switchbacks was quite an endurance hall, but made MUCH better by going early before it was full sun. We started the trail at 6:30 am and I wouldn’t recommend starting much later than that if you don’t want to be baked by the time you finish the first mile. Descending this is easier on the way out than ascending on the way in. The middle section is described above. The last part is descending some pretty slick terrain- steep, wet, covered in slippery leaves. I found ascending this on the way out easier (although tiring) than descending it on the way in. We used walking sticks (each had one) and it helped tremendously with the descents. At the beach campsites- two annoying things are the helicopters flying over and the mongooses/cats trying to steal your food.
Additionally, on the hike especially near streams... lots of mosquitos! Long clothing is best if you have some for sun protection/ warm weather. I wore a tank top and had 30 bites (even with deet) on my arms and back alone. Saw no boars but lots of signs of them.
So... with all these challenges, is it worth it? I would say absolutely. The waterfall views are truly beautiful, and of the 4 hikes we did this was the most rewarding. The beach at the end is great and has lovely scenery. Things we did right- bringing a water filter, walking sticks, and a hammock. Things I would do differently- wear long sleeves, not bring binoculars, maybe start even earlier on the way in.

10 months ago

Absolutely stunning in every way. Be respectful of this beautiful place... stay on the trail, pack out your trash, and let nature entertain you rather than have all sorts of noisy music going on. Hawaii is magic!

Monday, November 06, 2017

Start is hot and tough... middle is actually pretty easy with lots of streams to fill water. Last mile is worse than the beginning. After getting to camp absolutely take trail to waterfall. Very hard to navigate but a must. If you can get a ride down the hill to the start of the trail do it.

Monday, September 04, 2017

The only views are along the Z-trail, until you get to Waimanu. The rest of the way is beautiful, but no views really. It's mostly covered, and a relatively mild trail, but only lightly maintained. Some sections are torn up pretty bad by the wild pigs.

There are approximately 11 gulches you'll be hiking in and out of, and 4 emergency helicopter landing pads along the trail. Also, one emergency shelter nearby the last helicopter pad.

The trail down into Waimanu is the real Z-trail. Meaning it's a real pain in the ass! Loose lava rocks, hala tree groves leaving their leaves lining the trail virtually the entire way! These long leaves although incredibly useful, can be a real pain when their barbs get you.

Water Warning:
The stream at Waimanu has very murky water that is tough on water filters. Clogged my Katadyn Gravity Camp right up. Had to revert to our backup Sawyer Squeeze. Be prepared. Also, only UV or boiling will kill Leptospirosis, but we chanced it.

IG @niiimz_

Saturday, September 02, 2017

Incredible views. Good leg workout climbing and descending. Set an easy pace. Bring lots of water, something with electrolytes and snacks. A headlamp is a good idea if you want to stay for a while and enjoy sunset.

Wednesday, August 02, 2017

I have done this hike twice... once by myself (with very little hiking experience and never having camped alone), and once with an experienced hiker/advanced naturalist who had never been to Hawaii. Both times I hiked in and camped for two nights. It took me 5 and half hours both times in: the first I had a 25 lb pack, second, like maybe 10 lb pack, max. Both times were just as difficult-- but definitely go as light as you can.

The hike Took less time on the return, both times. Don't know why... maybe learned to pace better?

I will just give some advice on strategy.

BEFORE HIKE: Hydrate at least two days before, take electrolytes with you; a little less than 2 liters of water is what I consumed for the 8 miles in. (You can get more water at the spring in waimanu). Get to the trailhead early if you can. I would try to pay a local to drive you down waipio and then walk to the trail head. The hike into waipio valley is steep and hot. So get a ride, and take a short walk to the trailhead. Btw, I did NOT get there early. I began my hike around noon and my head nearly exploded from the heat.

BIG TIP FIRST MILE: Take your sweet ass time the first mile. It's hot, it's hard, and there is no rush! Enjoy the views, hydrate, keep your pace slow. Take breaks. Not an athletic competition.

In first mile you climb 1500 feet and it's pretty rocky and exposed, but after that, things start to even out and you can pick up your pace. It's also far cooler because the rest of the hike is mostly shaded with huge coniferous trees.

I learned to pace myself based on my heart rate. It kept things steady for me, and the hike back was quicker when I was more attentive to keeping at about 75% of my max heart rate. I stopped less. You will continue hiking up and down through 5 valleys, so bring some trekking poles or use sticks-- they really help! My partner thought he didn't need them, but on the way back, he picked up two sticks and admitted they helped quite a bit!

THE LAST MILE OF DEATH DEFIANCE: So... something few people tell you is that the last mile down is just as hard as the first mile up. The first time I did this hike, I fell about three times going down (and it's a very narrow trail here. Be careful!) second time I was far more cautious and took it slow. I am not woo woo, but I know Hawaii and I swear the menehunes hide in those damn rocks and laugh at you until you're humbled. My experienced partner, who usually hikes mainland east coast and Northern California mountains, thought he could do his usual pace, like when people tell you to jog down uneven hills so you don't fall... that technique may not work here. Little Rocks hide under large soft, rotting leaves and you are constantly slipping. He ended up falling four times and was not happy. It's pretty sketch and your legs will feel fairly fatigued by that time. Hawaii humbles you. So don't get too excited coming down... be patient... go slow... you will get your reward!

Finally, you do need a permit to camp. There are nine sites. But don't be too surprised if you see a squatter in the space you reserved. You could kick him/her out, or negotiate another spot. Even though I reserved a site both times, there was a squatter in my space. I just adopted the philosophy that there is a special place meant just for me... and both times that attitude worked great and I got a perfect campsite as well as a sweet little peace offering from the squatter. :)

Hike back: once you complete the hike and you are back in waipio valley, try to hitch a ride back or you might be hating life. Bring cash to tip drivers. I don't recommend leaving your car overnight in honokaa unless it's insured. Try to get rides.

Do your research on this hike... lots more available on some blogs, but I just wanted to give you some tips that may not be available there. Enjoy! If you make it to the valley you deserve every bit of the beauty that is there! Godspeed!

Tuesday, July 18, 2017

Difficult, but absolutely unreal.

Monday, May 29, 2017

Really beautiful hike! the views on Waipio and Waimanu valleys are amazing! we didn't have time to take a permit to camp in the Waimanu Valley, but it is a promise for next trip in Hawaï!

Sunday, April 30, 2017

Bring water treatments, don't overpack your backpack and most importantly check the weather. If it's dry you're good and its not a hard hike at all... but it could be VERY difficult and dangerous if it's raining. Don't go if it's wet, camp and wait in Waipio, you really don't wanna go if it has been raining.
We did the hike just 2 days ago and it was not as dangerous, difficult and scaring as everyone told us. We are not experienced and were not prepared very well, but due to the good and dry wheater we could easily do it.
The zigzag trail is steep and very tiring if it's sunny but starting very early (maybe 6 or 7) should help. The 5 miles in the forest offer lots of shade and are more like a walk than a hike. The last mile, down into waimanu valley, is very steep, slippery and really exhausting but always remember, it's less than one hour,you're almost there. We were lucky and the river was not to high to cross. The campsite is simple but nice and the view into the valley is awesome. If you get to choose, I'd recommend campsite N° 2, it's close to the river, the toilet,the sea and has the best view of waimanu valley and the waterfalls. Bring enough lightweight food and take your time, stay at least 2 nights. Also research about what kind of fruit and veggies are in the valley for you to eat at the time you're going to be there. Hike to the waterfalls,it takes around 40 minutes and is totally worth it. Better water quality than the river and stunning!

Time: Hiking into Waimanu took us 5:45hrs (30mins for lunch and some small breaks. Again, you wanna start earlier than 9 for the zig zag!!) and to hike out only took us 4:20 as we started at 9 and had very good, shady conditions in both of the steep parts (zigzag and climbing out of waimanu)

Sunday, March 26, 2017

Go prepared, but don't let the difficulty dissuade you from this hike. The hike itself is very pleasant, and more than acheivable. The valley is gorgeous, and if you're lucky there will be almost no one else there to detract from it. Fair warning, the helicopters touring over the valley are constant and get obnoxious VERY quickly.

Wednesday, December 07, 2016

I researched the crap out of this and then did it about a week ago.

I wouldn't want to scare anyone away from doing this hike, but I think one would be wary to heed the advice in some of these other reviews. You should be in above average/excellent shape to do this. The trail here is not what I would call treacherous, but it's pretty intense. The initial climb up the Z trail is something you'll probably underestimate. I'd say it took half of my gas tank out of me. My gf and her older friend were even less prepared. I had to take much of the heavy gear they had packed with them (that included three cans of spam and I do not know how that math worked out for them, but whatever).

I would advise you to bring enough gear to shelter in place for at least one night, and I would make myself very familiar with the trail map or I would carry a satellite gps phone of some kind. Some sort of water treatment, and gear to keep your equipment dry is a must.

You start down into the valley on one of the steepest roads you'll ever encounter. If you can hitch a ride down this stretch you'll be all the better for it.

Once you're in the valley you'll quickly come across your first "stream" crossing. I tried rock hopping across with heavy pack and I definitely wouldn't advise it. ideally pack a pair of wet shoes, take off your hiking boots, and cross with pack over your head.

Then you're going to hit the z trail. If you're not used to large elevations and are a little afraid of heights of would say that you'll probably be fine. You'll be able to see a faint, straight line in the face of the hill that looks like it overlooks a shear drop, but in reality you'll be enclosed by a lot of brush and grass. Great photo opportunities will be had, but be warned, this first climb is brutal. Even someone in excellent shape is going to feel this climb. It can get hot with the sun overhead so take frequent breaks and drink an appropriate amount of water.

Once you get to the top now you'll have the plateau to deal with. Your climbs are not over. You'll be trekking down and around gorges where falls drain into the ocean. While none of them seemed to be incredibly dangerous beware of flash flooding. If the water looks silty and mud-rich beware of a flood. It can be raining inland and be bright and sunny where you are and you still can run into a flash flood. I personally brought 80 feet of rope just in case.

You will have approximately 13 of these crossings to make. They can be a good way of motivating yourself to finish so it's good to keep in mind.

Along the top there are three emergency helipads (they're just grassy open spots where a helicopter can land). If you get too much wind taken out of your sails on the initial climb you can always shelter in place if you need to stay overnight, but DO NOT attempt this unless you are not in a spot where mud slides or trees could slip off. If I were to do it again I would advise doing such at elevation where the conifers are growing.

There is an emergency shelter at helipad number three, something like 2.65 miles from the actual valley. If you're feeling wasted, or if it's terribly raining this will give you a great place to shelter in place without having to worry about rain. We started a fire here with downed tree branches and some stormproof matches, but don't start a fire if it hasn't been wet out. The winds from the island will be fighting with the trades, so embers lifting and finding starting a nice little conflagration is something you'll need to consider.

Once you're past the emergency shelter you're basically almost there. The descent into the valley portends what you'll have to climb on the way up. I would say that this part of the trail was easier than the Z trail, but climbing it again won't be friendly either. Again, if you need to hike up to the emergency shelter and stop there, this is a good plan if you have the time.

And once again, you have another "stream" crossing. Depending on the tide this can be like the first stream or you could be up to your chest in water. There is a line threaded across this part, but we crossed where the stream meets the ocean, and this time I donned my water shoes and didn't have a pack to carry.

Once you get into the valley, there are a bunch of marked campsites and composting toilets. Views, again, are spectacular.

My advice would be to backpack this. Be frugal about what you carry and leave early. Drink plenty of water. Use trekking poles, have water treatment, and ideally carry water shoes so you can ford the streams to get to your location.

Highly rewarding and something you'll be able to say you did that most people don't do when they come to the big island. Don't take it lightly, but this isn't going to kill you unless you've never done any kind of endurance training.

If you've never hiked over moderately steep terrain with pack I wouldn't attempt this or I would

Wednesday, August 03, 2016

Great hike. Challenging but worth it.

Make sure to bring a water filter so you can fill up at each waterfall along the way.

Also, the first big uphill trek is really tough, so it is best to have filled up your water container at the bottom (I learned this the hard way and was pretty parched by the time I got to the top and over to the first stream crossing).

There are lots of mosquitos at the stream crossings so apply mosquito repellent generously at the start of the hike.

Definitely worthwhile!

Sunday, June 05, 2016

Incredible!!!!! Challenging, memorable ... Insanely beautiful

Friday, February 19, 2016

Ok, so here is the down and dirty of the Muliwai trail, and the hike into Waimanu. I had hiked the Kalalau on Kauai multiple times (going as far as you can without a permit), and in many ways this is very similar. To set the record straight, parking at the overlook and going all the way to Waimanu and back in a day is completely possible but heed these warnings: You will be hiking near 20 miles in a single day with CONSIDERABLE elevation changes, and you should not even remotely consider doing it unless you are in very good shape and you can start early.

The road into Waipio is awkward going down just because of the angle of descent, walking to the beach is super quick even though you have over half a mile from the bottom of the road to the beach. It is then half a mile across the valley, the beach has soft sand so it can take time and is taxing. Waipio river is no joking matter, the time I went it was relatively low flow initially, but because of the color of rocks, gauging depth is tricky (poles would be useful here).

Once you finally reach the trailhead at the far end of the valley wall (be sure to take pictures of the Z trail), you are already over 2 miles of traveling in, albeit not particularly strenuous. The Z trail is fickle, while it is of decent width, and always is fairly stable since you are essentially stair climbing the entire way, it is also a 1200' elevation gain in less than a mile and about 1/2 of it is in direct sunlight with absolutely no shade.

Once you reach the fallen needles and the dry forest it is pretty easy hiking, comparatively. The trail is always pretty obvious, and you do undulate up and down a lot, but between the tops of the two valleys, somewhere around 5 miles of "easier" hiking. It is nicely shaded a lot, often a nice breeze will roll though and there is a cute waterfall to break, (as well as some helipad areas).

The hike down into waimanu is steep, the trail is wide and footing normally isn't that bad. It does require going down several hundred feet in elevation on the trail to even get the first glimpse of the pristine valley.

Hiking out of Waimanu is when I had my "oh shit" moment, I realized how tired I already was. I had already hiked roughly 10 miles in, and had to do it back. This time, however, I had to hike out of the valley, hike back to waipio, then down and out of that valley. On the return trip, in ways it is easier but in ways it is more difficult since the most taxing parts are hiking up the Z trail, then on the return hiking up out of Waimanu and then hiking up the road out of Waipio.

Now here is my personal warning: if you do this in a day hike, set a HARD turnaround time, no matter how close you are, otherwise you could strand yourself without proper supplies. Also be wary of the weather, it was starting to get cloudy when I left Waimanu and by the time I had to cross the river back in Waipio it had obviously been raining and the river gained considerable force and grown quite a bit wider. It went to not even waist deep and maybe 40' across, to one part was almost chest deep, and 50' across.

After the hike to Waimanu and then back to Waipio, all I was personally concerned about was getting across the river before weather reared its head, going back to the road and then up the road is a pain but is manageable.

This is one of the coolest experiences I have ever done, and now that I live on the island, I am excited to redo it this time camping instead of doing a day hike. I was at the Waipio lookout around 7:30 and I got back to the top around 5, and I took very very little breaks. So unless you are very fit, and a very experienced hiker do not do it in a day, it is 20 miles of roads and trails, and I am certain you have to lose, and climb, a vertical mile along the way.

Wednesday, September 09, 2015


Friday, May 22, 2015

It was the most beautiful and challenging trail I've ever experienced. The campsite is the best reward

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