Harmonica Arch Trail

HARD 25 reviews
#39 of 170 trails in

Harmonica Arch Trail is a 5.4 mile lightly trafficked out and back trail located near Sedalia, Colorado that features a river and is rated as difficult. The trail is primarily used for hiking, nature trips, and birding and is best used from April until November. Dogs are also able to use this trail but must be kept on leash.

5.4 miles
1,200 feet
Out & Back

dogs on leash



nature trips




wild flowers




Sculpted from granite, Harmonica Arch is one of Colorados longest arches. You can see Harmonica Arch from the lower Goose Creek Trail, and the short hike to this suspended spectacle provides a unique outing.

6 days ago

Loved this hike. Did it on a Saturday afternoon. On the portion of the trail along the creek, I came across 4 or 5 groups camping by the river. Once the trail left the creek side and started heading uphill, I didn’t see another person on the way up or down.

The trail is physically challenging for a relatively short hike, and in places the trail is slippery due to a bit of gravel on hardpack in steep sections. Even though the trail is in an area with a lot of burned terrain, the trail itself is probably 90% in the shade, so not a bad option for a hot day.

Finding the arch is slightly tricky. They key is knowing that you have to go over the summit and down the dome a few hundred yards.

Follow the cairns once you leave the creek side trail and you should be fine.

14 days ago

We lost a dog about a mile up on Matukat road on the way to the trail head. He is a Newfoundland black lab mix and his name is Milo. He has Colorado tags, if you find him please call the number on the tags.

1 month ago

Tough workout, worth it to scramble over some big rocks and see a great vista. Would do again. True story, the trail is at times hard to figure out, but we followed the cairns, and our GPS when needed, got us there just fine.

3 months ago

Tough trail, but well worth the effort! If not for other posted reviews, not quite sure we would have made it. Once you leave the creek and start climbing, the trail becomes pretty nonexistent. We went into it assuming we'd get lost as others have commented due to it being poorly marked. Despite our best efforts to follow the trail map, it only gets you so close. There are so many random trails up there, but they all appear to eventually end up in the same place. Definitely watch for the cairns, they are your best resource once you start making your way around the dome to begin to climb. The arch takes a bit of effort to get down to; to the right and down the dome face towards the organ pipe rock will get you there. We didn't see anyone else out there until we were finally heading down to begin the hike back. Great workout, would do it again. Would not recommend for novice hikers

3 months ago

Great hike with amazing views. The trail is hard to follow from the river bed. The all trails map keeps you close, but keep an eye out for the cairns they are well placed. We saw a couple other groups on the trail, but for the most part were by ourselves. Will do this again!

11 months ago

We had trouble finding the trail, the roads to it are not well-marked, but we had no problems once we found the right roads. It's a difficult trail, not for the run-of-the-mill hiker. The people I was with are inexperienced and having a difficult time on the steep parts, which were slippery due to dryness. The trail is not always well-worn, so you have to find the cairns to guide you. You have to explore a bit on the dome to find the arch, but it was well-worth our efforts in the end :)

Monday, August 07, 2017

extremely steep and difficult to follow Cairns as you are hiking up. you have to walk quite a bit down the face of the dome to be able to see the arch.

Friday, July 14, 2017

Very hard/steep. Just had to keep looking for cairns to find the way, and even at the top, took over an hour to find it. Totally worth it

Saturday, June 03, 2017

Great trail. Wonderful views and unique terrain. Used one of the reviews here and the route/GPS on AllTrails and easily found our way. The arch is easy to find if you just head in the direction of where the Organ Pipe Rock should be (you can't quite see it till you crest over a rock). Almost didn't do this trail because of people complaining about not being able to find the arch but I'm glad that didn't discourage me. Great little hike with basically no people once we got about 0.5mi from the TH. Such a hidden gem!!

Wednesday, May 17, 2017

A group of friends and I attempted to hike to the arch, but we couldn't find the trail after the creek and where we approached the rocky area. There is no signage and the trail isn't well maintained which threw us all off.

I had been on this trail 10 years ago with the Colorado Mountain Club where our two leaders knew where to go.

We were bummed that we didn't get to the Arch or close to it, but we had a great time and it was a beautiful day.

Monday, June 13, 2016

Fantastic hike, strenuous because of elevation gain. I pulled into the parking lot for Goose Creek and their must of been 50 cars. Most were doing Goose Creek. Harmonica Arch shares about the first mile with Goose Creek so that first mile was packed. Once I left Goose Creek the crowds were modest and most of these stopped at the base of the mountain so I only shared the climb to the arch with one other couple.

Their were many great camp sites for backpacking if you want to make it an overnight.

The arch shouldn't be hard to find. The other reviews gave excellent trail descriptions. I would add that once you reach the top, you must go all the back to find the arch so don't quit to soon. Left back gets you views from the top, Right back gets you around underneath, but to get underneath is not for the faint of heart.

Monday, May 16, 2016

Spectacular hike. I don't know why the person before me gave it only 3 stars. This is 1 of my absolute FAV hikes this season and I don't give out 5 stars often.

The Arch is IMPOSSIBLE to find though, unless you know where you are going and might be the reason for lower star rating. I went with the Colorado Mtn Club; the team leader has lead this hike for numerous years. Without him, I would NEVER have found the Arch on my own. I tried to record my tracks on Alltrails but the app failed.- EPIC failure. Have to find another app that works better to record tracks.

But perhaps it is just as well, to keep the arch elusive since there were NO hikers going to the arch when we were there. Everyone went to the Shaft house or the campgrounds.

Even getting to the TH is bit of long drive up dirt road. From Denver, take US 285 to Pine Jnx. Turn left on Pine Valley road at the traffic light. Continue south on Pine valley road a few 100 yards to a dirt road on the right. Turn right and follow signs to Goose Creek campground. Go past the campground about 1 mile and turn right on road to Goose creek trail parking lot.

The sign at TH shows Lost Creek Wilderness. They just put a new wooden sign for Lost Creek right as we were starting our hike (see pics).

The trail goes through the Hayman burn area. We saw a large snake on the logs below near the creek side. (see pics). Past first log crossing (they have put in two new logs at the crossing), continue on Goose creek trail, following the creek. When you get to the second bridge (an actual bridge, not log crossing) DO NOT CROSS the bridge. The trail continues on the left side. The trail is not marked, but is quite apparent on the left. Just follow that trail along the creek, it winds up and down and you get to a clearing where if you step off the trail on the right you will see the Arch in the distance next to the organ pipe (finger) rock formation (see pics). Continue following the trail and you will see big rocks on the right. You want to keep the giant rocks on the right and in sight as you climb up. Don't veer off to left or you will end up in the canyon. The trail drops down right towards a campsite, you will pass that campsite and continue climbing up on the trail. The trail eventually gets very faint and lost once you get up near the rocks. There are some small cairns sporadically, but really hard to find. There were several faint trails, essentially keep climbing up until you leave the trees. You will see 1st of the balancing rocks (called balanced "notes"). If you look up you will see the trail continuing up the rocks up and slightly right direction. You will come to a very smooth rock basin, this is where it gets hard to find since you are going over the arch and coming up from the top behind it. When you see the organ pipe, there is a steep walk down the granite rocks down towards it and traversing across before you get to it to get to the arch. If you are afraid of heights this may not be for you. But the granite surface is pretty solid so personally I did not think it that difficult- take small steps. If you try to use long running steps and momentum you might find yourself flying off into space!

You can climb up over the top of the Arch if you have time. We had leave since rain clouds were gathering overhead.

There is no denying that it is extremely hard to find the arch once you get in the rock gully past the creek. People have given up around the gully ledges since it is hard to find the way to the top. BUT THE ROCK FORMATIONS AND VIEW IS WORTH IT (see pics).

Coming down, we took another route from the other side and I can't even describe it since it was extremely hard to find had it not been for the CMC team leader who knew his way around; and even he had to check his bearings once in a while. From that side you have to cross the creek at one point and the crossing is from UP not from down towards the creek. This way you come back to Goose creek trail on the other side and cross the bridge this time on the right to get back to the original trail. The way down from this side was lot of off-trail hiking with several prickly plants that will scratch you or tree limbs that will get you in the eye if you are not careful.

However, all this is WORTH it I guarantee you. I thought this was an amazing hike, with fabulous views and curious rock formations. It is rated only as Moderate B being 6 miles and approx 1600 ft elevation gain; but since it is lot of off trail hiking and rock scrambles at the end, it seems much harder exertion than normal Moderate B hikes.
Will do this again next year! Yea!

Wednesday, October 21, 2015

Hard to get to and hard to stay on the trail but well worth it to see the arch up close.

1 month ago

2 months ago

3 months ago

4 months ago

7 months ago

9 months ago

10 months ago

Tuesday, July 04, 2017

Sunday, June 04, 2017

Sunday, December 04, 2016

Saturday, July 02, 2016