El Capitan - Explore Inside Alaska’s Largest Cave For An Enchanting Middle-Earth Experience

Explore The El Capitan Cave

Prince of Wales Island

 By: Courtney Dowd-Stanley 

Head to Prince of Wales Island in the breathtaking southeast region of Alaska, and experience an incredible Alaska cave, El Capitan, the largest known above-ground cave in the Last Frontier. The island itself boasts over 600 caves, all varying in size, with El Capitan being the largest and most recognized of them all. A wooden staircase through the lush Tongass National Forest leads to the cave’s entrance. This middle-earth experience is filled with an abundant amount of natural history and excellent wildlife viewing opportunities. Exploring El Capitan Alaska's largest cave Flickr, Chris

El Capitan Cave is a fairly isolated treasure located deep within the Tongass National Forest. 

Exploring El Capitan Alaska's largest cave Flickr, Mack Lundy The El Capitan cave entrance faces south across the shallow El Capitan Passage, which provides a spectacular view overlooking Kosciusko Island on the Alexander Archipelago. To access the cave's entrance, one must either be shuttled to the area on skiff or by plane, or drive down a long gravel road to the trailhead. Below the cave you'll find a forest service camp, which gets its water from a spring that emerges below the cave.

Enjoy tours of this enchanting attraction by knowledgeable forest service guides. 

Exploring El Capitan Alaska's largest cave Flickr, Mack Lundy During the peak travel season of May through September, free naturalist-guided trips are offered by the USDA Forest Service. Independent trips inside the cave are not allowed so making a reservation for a guided trip is necessary. The tour last approximately 2 hours. Contact the Thorne Bay Ranger District at 907-828-3304 to reserve a spot. The cave is closed during the winter. To learn more, click HERE.

Upon arrival, you'll be greeted by the most awe-inspiring views in every direction. 

Exploring El Capitan Alaska's largest cave Source: usd.edu Woo-sah... get ready to break a sweat! There are 367 steps leading up to the cave’s entrance, but don't worry, it's a lot easier on the way back down. Plus, the towering trees keep the area nice and shaded (perfect for a warm summer day). Southeast Alaska does get a lot of rain, so be sure to hold onto the handrails as the steps can become quite slippery when wet. The temperature in the cave is a constant 40 degrees, so make sure to have warm clothes with you. Also, proper footwear is a must.

The wooden stairway that winds through the thick wilderness area boasts an impressive 370 steps in total leading up to the cave entrance. 

Exploring El Capitan Alaska's largest cave Source: usd.edu El Capitan is truly a nature-lovers paradise with many twists and turns that greet you along the way. The geological formations are impressive, while the signs of wildlife are exciting to spot. The cave serves as a home to bats and river otters. Two different species of brown bats use the cave most frequently during the winter months. Small organisms such as amphipods, collembolans and mites are also found in the small pools scattered inside the cave.

Along the way you'll have plentiful opportunities to soak in the majestic middle-earth environment that surrounds you. 

Exploring El Capitan Alaska's largest cave Flickr, Gary O. Grimm

But remember that you are in the middle of the wilderness, so you'll see your fair share of surprises along the way. 

Exploring El Capitan Alaska's largest cave Flickr, Mack Lundy

This Alaska cave has served as a home to a wide variety of wildlife throughout the years. 

Exploring El Capitan Alaska's largest cave Source: usd.edu

In fact, bears have used this Alaska cave for thousands of years, with remains from brown bears dating back over 12,000 years.

Exploring El Capitan Alaska's largest cave Source: usd.edu After a long, harsh Alaska winter, you never know how stable these caves will be. Remember that the earth is constantly shifting (Alaska gets an average of 1,000 earthquakes per month, or 33.3 per DAY) so using extreme caution is a requirement here. Caves of any kind are very dangerous and contain fragile areas, so be careful as you navigate through this tremendous geographical wonder.

When you reach the Alaska cave entrance, this obligatory caution sign will greet you with a warning that you don't want to ignore.

Exploring El Capitan Alaska's largest cave Flickr, Mack Lundy

This is Alaska’s largest and longest known above-ground cave. 

Exploring El Capitan Alaska's largest cave Flickr, Gary O. Grimm

Enjoy learning about the geological explorations of this 13,000-foot solid rock cave. 

Exploring El Capitan Alaska's largest cave Source: usd.edu
Looking for more where that came from? If you enjoy fresh air and experiencing Alaska’s breathtaking natural beauty, be sure to check out these 13 Alaska hikes under 3 miles that everyone will love. We’re positive that you’ll also enjoy The Alaska Life’s treasured tiny towns road trip that will lead you through the most spectacular amounts of scenery.
Be sure to let us know (in the comments below) what your favorite Alaska cave destinations are. If you love getting outdoors and experiencing all the fascinating geological formations that The Alaska Life has to offer, we want to live vicariously through you! Share your favorite Alaska cave moments with us on our Facebook page by clicking HERE, and they might just end up being featured in one of our next blog posts.
Written by Courtney Dowd-Stanley 


I totally agree about pictures from inside…. The only other “above ground cave” I have ever been to was in Utah, Timpanogo’s Cave, and it was literally a 3/4 mile (or more?) walk up the side of the mountain. Think I was about 16 then, but it was TOUGH, and now at 66 I cannot climb but maybe 2 flights of stairs without feeling like fainting and I am in pretty good health too, but do have both knees and both hips replaced so that many stairs to have to climb both directions would NOT be a good thing on these bionics at this age, so YES INTERIOR PICTURES would be very nice to see for those of us who will NEVER be able to see this place! I am also a 41-year Alaskan road musician and I’ve seen a few places…and have MANY MANY stories as well that involve just as many “weird” places and people, (“REAL Northern Exposure”)…so if you ever want to do a story about those kind of places, I’m your singing sourdough girl!

LuLu Small April 17, 2021

What about the huge cave on Mitkof Island? Thought it is 2nd largest in northern hemisphere….

Tekla April 17, 2021

“Longest above ground cave in Alaska” (from this article)

Who knew? (I thought all caves were below ground) LOL


Dingle Donkler April 17, 2021

I worked on the Tongass NF and lived on POW in 1989. We stayed out at the Forest Service camp many times and loved exploring this cave on our own after working in the woods all day. There were no stairs, hand-rails, or guides and we used our headlamps and wore our rain gear and xtrtuffs.

Kuykendall Debra April 17, 2021

Lol I use to live in Missouri, now my home is Alaska!

Paul Smith April 17, 2021

I had the privilege of exploring this cave with the Tongass Cave Project in 1991-1992. I linked 2 maps to find a better entrance to access the bear den. Great cave!

Mark Fritzke April 17, 2021

The last picture is a photo of my husband, Dan Monteith. How can I get a copy of it? Please reply to my email address.
Thanks, Cameron Young

Cameron Young April 17, 2021

Above ground cave?

Greg April 17, 2021

Been there done that, nice to see a picture of Dan Monteith in the cave, had lots of fun times caving on the Tongass Cave Project

Simon Dillon April 17, 2021

Great article, but I agree I was hoping for more cave pics. Thanks for taking the time to write!

Tommy D April 17, 2021

While living in Petersburg in the 1990’s a couple of Forest Service spelunkers gave a presentation with slides and videos of El Capitan and several other caves on Prince of Wales and maybe Baranof too. It’s been a while back so don’t recall everything. They, at that time, were planning to do guided walks through some of the more “safe” caves.

Glenn Miller April 17, 2021

Thank you for sharing this with us!!! Now we have one more great thing to plan in Alaska!!!

Kirsten April 17, 2021

It’s the Forest Service Camp….NOT First Camp….I tried to edit it but can’t… Also 3rd line from the bottom should say…Who KNEW where the bottom was….Not KNOW…..Thanks you. My tablet changes words.

Ellen Mc Daniel April 17, 2021

Took a trip through the cave about 10 years ago and I still remember it well. Not your touristy trip, but rather you get the feeling that very few people have gone before you. Bring a good flashlight and be prepared to leave a little dirty, but well worth the trip. It is a long drive down a dusty or muddy road!
We’re planning on taking the grandkids this year.

Dick Fikes April 17, 2021

We lived at ElCap from 1990-1993, in the South Coast Construction camp. While there, a group from National Geographic came and filmed inside the cave for an article…They stayed at the First Service Camp. There were no stairs then, and no guided tours, you went in at your own risk. A friend an I hiked up the trail and went in aways…Not far tho..There were big holes with water in them, and who know where the bottom was…It was awesome, how it could be like that in the mountain.
This is amazing to see how they have made it so much easier to hike up there and the improvements..

Ellen Mc Daniel April 17, 2021

Maybe we can even do a video on it soon! Thanks for the feedback!

Kyle April 17, 2021

Kyle, please do!

Margie April 17, 2021

Since it’s unlikely for most (who don’t have gear and caving experience) to visit this cave… it would have been better to see at least a few more interior shots instead of just the stair walk up to it.

Ano Namous April 17, 2021

Did not know about that cave, lived in Alaska many years. Now live in Missouri.

Terry Watkins April 17, 2021

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