Triangulation Peak and Boca Cave Trail [CLOSED]

MODERATE 81 reviews
#6 of 119 trails in

Triangulation Peak and Boca Cave Trail [CLOSED] is a 4.6 mile moderately trafficked out and back trail located near Breitenbush, Oregon that offers the chance to see wildlife and is rated as moderate. The trail offers a number of activity options and is best used from June until October. Dogs are also able to use this trail but must be kept on leash.

4.6 miles
1062 feet
Out & Back

dogs on leash

kid friendly




nature trips

trail running







washed out


An easy hike with fantastic views of Mt. Jefferson and a little know gem of a cave that frames the mountain in the distance.

7 days ago

All clear, some snow/slush puddles on the trail that are easily traversed. The trail down to the cave is pretty loose and involved a lot of ash and charred soil, but doable.

20 days ago

road clear to the top beginning of the trail head the first .25 mile down trees but it open up snow on the switch Back on the Eastside slop but it walk able and people have marked it walking on top the snow the lower trail is still closed

28 days ago

Tried to go up last weekend but there was too many downed trees still. Road is open and has been cleared but the trees must have fallen after. No snow. Great hike when you can make it.

8 months ago

I bet it's beautiful! Tried to hike this a week ago and it's closed off due to a fire a few months back. If you try to attempt it, you'll only get about a quarter mile in before you're completely blocked. Not worth attempting it until they reopen it. It's a trek to get there too so just wait. Hopefully this will open in the sprig because I bet the views are amazing!

10 months ago

According to the USFS website, portions of Triangulation Trail is closed due to an active fire burning in the area.

11 months ago

Great hike, pretty easy until the last 0.8 miles when you start some switchbacks. Bushes are overgrown onto the trail wish I would have worn pants. The views we phenomenal!

11 months ago

Great hike. Started at 3 pm on Monday and finished about 7pm. Pretty easy hike until just before the peak then it is an uphill climb but its nothing too crazy. Had my dog with me and she was off leash she did perfectly ok and because there was no one on the trail I let her roam. Getting to the cave was little less than easy because it's not an up kept trail but it is managable. Overall great trail, beautiful scenery, and easy hike.

11 months ago

Got to the trailhead about 8am yesterday. (Saturday) Hiked to the peak first and met a couple of campers who told us how to get to the cave. The trail is pretty moderate and flat until you get to the sign for the peak and loop trail. Stay to the right to get to the peak. Before you get to the peak there's a trafficked trail that goes off to the right. That's how you get to the cave. A little ways up the cave trail there's a small 3 ft part of a broken tree with a pink ribbon. Turn right there and keep going down a steep down hill slope about 1/4 of a mile and it'll loop around to the cave. It's a little hard to find if you don't know where to go but so worth it!

11 months ago

Nice hike. Beautiful view! Went up yesterday, started at 10 am and saw a total of 15 other people on the trail. At the peak we climbed the tallest rock and ate lunch on the top. Amazing view of Jefferson, South Sister, Three Fingered Jack and Hood! The trail to Boca Cave was pointed out to us by another hiker. I'm not sure I would have found it on my own. The cool cave was perfect after the hike up to the peak! Saw a lot of huckleberries setting. I'll definitely return when they ripen.

11 months ago

We had a great hike to the summit and to the cave. Such a perfect day for the hike and there were no other people up there.

11 months ago

Monday, June 05, 2017

Couldn't do this hike again because of the snow blocking the road. Maybe in a few more weeks it will be cleared!

Thursday, February 16, 2017

Great hike with amazing views! The Boca cave was a little tricky to get to but well worth it.

Tuesday, November 15, 2016

Great hike phenomenal views. Once near top follow cairns and side trail to caves moderate intensity
Suggest stopping at Rosie's Mountain Coffee House on 22 (NE Santiam Blvd) before and/or after hike for coffee and sandwiches address;
647 NE Santiam Blvd
Mill City, OR 97360
United States

Friday, November 11, 2016

A bit hard to find the trailhead but well worth it in the end!

Monday, November 07, 2016

Get trail! The views are amazing. I will say though there wasn't much to look at until you got to the view point

Wednesday, November 02, 2016

Beautiful trail. Fairly easy too- until you hike down to the caves (which you should definitely do!!). It's very steep and slipper- but it's an incredible view and experience to be in the cave.

Thursday, October 20, 2016

Fun hike and beautiful view when you get to the south side of the mountain. Kind of. boring for the first 2.25 miles then it is wonderful. Hard to find the path to Boca Cave so be on the look out.

Sunday, October 09, 2016


Sunday, October 09, 2016

Beautiful views at the top. It is a little difficult to find the caves, best to print out directions to store in backpack.

Saturday, September 17, 2016

Excellent out and back. There's a couple spots to camp near the peak. Get some good photos of the moonrise over Mt Jefferson. Couldn't find the trail to Boca Cave though.

Friday, August 05, 2016

The review with directions starting at McCoy Creek are the best directions. Incredible views at the top, didn't have enough daylight to find the cave but that's on the agenda for next time. Loads of wild huckleberry bushes along the trail. Very easy hike except the last half mile+ which is doable but a bit strenuous on a hot day. Lots of mosquitos and biting flies except at the top; mostly will leave you alone unless you stop moving.

Friday, July 29, 2016

The drive up was pretty gnarly but it's worth it -just don't turn down the wrong road. You won't have cell service up there. There's a parking area at the top near the beginning of the trail. The whole hike is awesome and pretty easy. The beginning is pretty level and full of pungent wild flowers and then you start winding up the mountain. I encountered more than a handful of downed trees on the trail, which were no big deal. Unfortunately I couldn't find the cave. I took the trail up to Triangulation Peak, but it looked like there was another trail. The end of the hike is the peak and the views are amazing. I was able to see some campsites from the peak- maybe this is where the other trail leads? I will definitely be back!

Sunday, July 17, 2016

Great hike great view.

Thursday, July 14, 2016

Awesome hike! gorgeous view of mount jefferson. If you come from 126, take the alternate route. the GPS tries to take you on NF 302 to get up to the trailhead but that road is not open to vehicles. instead drive past that road and take the next forest road which is nf2233 then turn right onto nf 650 which will take you to the trailhead.

Saturday, July 02, 2016

A great hike! Enjoyed this trail and blooming wildflowers along the way. Views at the top were amazing and I felt like I could just reach out & grab Mt Jefferson. Steep down to the cave, but on this very hot day it was well worth the dampness & cool breeze inside the cave.

Monday, April 04, 2016

I loved this trail! I hiked it about 2 years ago but still think about it because the view at the end was just so pretty! There was no one on the trail except for me the day that I went, and I feel like this trail is usually like that since it is so far out there! Shorter, easy hike with great views and a cool cave to check out!

Friday, November 27, 2015

Super fun trail with some amazing views. Hiked it with 6 inches of snow, more at the top and the trail was well marked. I was amazed to see a few cars up there with the conditions. Saw an amazing sunset and hiked out in the dark.

Saturday, November 07, 2015

Picked a beautiful November day to hike. Gorgeous view of mt. Jefferson! Don't forget to head down to the cave but be careful it is steep.

Sunday, August 09, 2015

The hike is not too bad, gets steep at the end but not for too long. The views are fantastic, and it is set in a lovely bit of forest with good shade for hot days. I definitely would recommend visiting boca cave, it really was not as bad as I had expected. Definitely some steep areas going down, but nothing dangerous and should be fine for anyone of moderate fitness. When I got there, I saw a family with two dogs in the cave. It is quite slippery though, so bring a good pair of shoes. The entrance to the trail that leads to boca is actually quite clear and veers to the left as you hike and then there is an opening before it narrows. But it's still quite obvious where footprints in the dust from previous hikers are (in the summer).

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