Diablo Lake Trail

MODERATE 58 reviews

Diablo Lake Trail is a 6.9 mile moderately trafficked out and back trail located near Marblemount, Washington that features a lake and is rated as moderate. The trail offers a number of activity options and is best used from April until September. Dogs are also able to use this trail but must be kept on leash.

6.9 miles
1492 feet
Out & Back

dogs on leash

kid friendly



nature trips

trail running






wild flowers

This is an out and back trail with mild elevation gain that takes you through interesting landscapes, including rainforest-like vegetation, rocky fields, dry open areas and the Skagit River. About halfway down, the trail leads along the top of a gorge, from which you can look down at the turquoise waters of Lake Diablo. At the end of the trail the Ross Dam is visible. This trail does not have the most beautiful views of any hike in the area, but the varied vegetation keeps things interesting.

2 months ago

not the best hike but a decent little afternoon out and back and a great starter hike for those folks who enjoy nature walks and want to jump to the next step of an actual "hike." I say this because there is minimal elevation gain but has enough subtle gains, rocks and root systems to warrant it a hike (though, we were passed by a trail runner. how they can run these things and not break an ankle I'll never know). it's a fun way to get in a little exercise while playing tourist as you check out diablo dam and ross dam as well. the switchbacks close to the final descent to ross dam may be challenging for beginners but you can bypass them and head straight to the lookout point and settle in for a lunch there if you wish. the best part for us was being able to see the lake(s) from the other side instead of the highway AND seeing the inlets and islands we kayaked to the day before. be aware: if you do not like heights, you may not enjoy the break in the treeline close to the halfway point ; it's steep, narrow and really cool! I am a major klutz so I walked purposefully and used my poles. overall a very level and fun hike. I would say be mindful of the steep mountainside if you've got little ones or people afraid of heights but it's a nice little ditty for sure.

5 months ago

beautiful Lake!

5 months ago

This is an out and back trail that takes you through interesting landscapes, including rainforest-like vegetation, rocky fields, and dry open areas. About halfway down, the trail leads along the top of a gorge, from which you can look down at the blue-green waters of Lake Diablo. At the end of the trail the Ross Dam is visible. The views aren't stellar, but the water is very pretty when you can see it and the mix of vegetation made it an enjoyable hike for me. If you're looking for big views, seek elsewhere.

5 months ago

Good hike but the end of the trail wasn't very exciting. Leads you to a bridge by the Dam.

7 months ago

view at top isn't really anything special. if you take the ferry back you can actually see many more beautiful views

8 months ago

Loved this hike! I agree that you don't need to finish the hike to get the views. Be sure to also hang out at the lake @ the bottom of the parking lot!

8 months ago

the views are amazing and once you get to Ross dam you can cross a bridge and go through a tunnel

8 months ago

Don't need to finish the trail, but the views are unbelievable

9 months ago

Friday, December 30, 2016

Wednesday, August 24, 2016

Very pretty hike!

Sunday, August 21, 2016

So dissapointed in this hike. the views from the parking lot or even driving around the lake are better. I would never recommend this to anyone, hike up to the top, have a little view point, then you hike back down the other side to the lake for not much, only to see a dam. If you are going to do that, i recommend timing it with the ferry since we would have had to wait 3 hours for the ferry so we made the awful hike back up.

Sunday, August 14, 2016

Best day trail we've done since I've come up to the area. make sure you reach the bottom at the end and take a couple (very. . .very short) swims. From what I've heard the water is glacier fed. From what I felt, I believe it! We got lazy after swimming and took the ferry back... be sure to bring cash (10 per person) if you want to take the boat back!

Monday, July 11, 2016

Nice, easier hike with not too much elevation change. We did it as a second hike of the day and had no problems, minus getting lost at the Ross Dam end thinking there would be a lookout. A few good views of the lake and surrounding mountains, but by far not the best hike in the area.

Sunday, June 19, 2016

It definitely had some great views, at times. However skip this of you want to separate yourself from all things manmade. It is a good hike for beginners and those with so so knees. Very mild elevation gain.

Sunday, April 17, 2016

lost...did not finish

Sunday, April 03, 2016

Beautiful, warm, spring day. Lovely views of the surrounding mountains and lots of water in the creek beds. Not many flowers yet. One person in our group went swimming, twice. We hiked from the parking lot up to the suspension bridge and back.

Friday, July 04, 2014

Nice trail hike for some good exercise. Not many amazing views however as trees obstruct a lot of the nice views. Overall it was an enjoyable hike but there are many other hikes in the area the provide better scenary.

Thursday, August 23, 2012

Nice hike when the snow is still in the mountains. We have never seen so many lady slippers in our lives! They were all along the trail.

Sunday, November 06, 2011

A nice stop and hike to do if you have time while passing through the North Cascades but doesn't come close to what awaits you in the heart of the park. Family friendly and very beautiful to be down in the iridescent glacial blue waters of Diablo. Always enchanting.

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