First and Second Flatiron Loop

HARD 752 reviews
#3 of 98 trails in

First and Second Flatiron Loop is a 2.5 mile heavily trafficked loop trail located near Boulder, Colorado that features beautiful wild flowers and is rated as difficult. The trail is primarily used for hiking, walking, trail running, and rock climbing and is best used from April until October. Dogs are also able to use this trail.

DISTANCE
2.5 miles
ELEVATION GAIN
1,427 feet
ROUTE TYPE
Loop

dog friendly

hiking

rock climbing

trail running

walking

forest

views

wild flowers

wildlife

rocky

snow

Directions from Highway 36: Take the Baseline Road exit and travel west toward the mountains. Follow Baseline Road 1.5 miles passed the entrance for Chautaugua Park to the Gregory Canyon Trailhead. Turn left into the parking lot on a dirt road. A parking fee is charged at this trailhead for vehicles not registered in Boulder County or not displaying a Boulder Resident Permit. Permits can be obtained at the trailhead or at the Chautaugua Park Rangers Cottage.

hiking
muddy
rocky
scramble
snow
24 minutes ago

Did this trail 15Feb - still very icy and slippery in many places. Would recommend spikes or at the very least good hiking boots. On the way down I slid quite a few times in hiking boots. Still, a wonderful trail that has great views and I would highly recommend it!

**the optional trail (not on the map) past the lookout that leads to the top of the second flatiron is incredibly icy and steep. I bailed in hiking boots due to slipping and falling a few times. Definitely take spikes if you plan to do this

hiking
muddy
rocky
snow
6 days ago

Beautiful trail once you get into the trees! Pretty good trek uphill with a tiny bit of bouldering once you get to the proper trailhead. Def recommend cleats/clamp-ons, pretty icy with packed snow towards the top. Prob only a good idea to bring your pups if they can climb. Either way, gorgeous views all around. Hard to believe you’re just outside the city.

hiking
muddy
rocky
snow
12 days ago

I would recommend this trail to people who enjoy a little challenge. Not bad if you take your time, but it’s definitely fun to push the pace. Bring your micro spikes bc snow and phone for pictures! Fun hike.

hiking
snow
19 days ago

Beautiful view of Boulder and the mountain range. Packed snow and ice most of the way. Micro spikes were extremely helpful. Very windy near the top!

19 days ago

Beautiful hike. Trail was a mix of snow and ice. Would highly, highly recommend traction. People were making it up without spikes, but there was a lot of icy/slick areas.

hiking
20 days ago

Beautiful this morning. Quiet early. Did without spikes but would have been helpful in some spots.

30 days ago

Very icy near the top. A bit of a scramble too, most dogs wont make it the last .4

1 month ago

Icy and snowy on trails! Need micro spikes or at the very least hiking shoes!

hiking
1 month ago

Hiked 1/12/2019. Lots of snow, microspikes are helpful. Trail is easy to find. Started at 8:30am, only passed a few people coming up, but trail was busy on our descent.

hiking
1 month ago

Great trail & great views. The flat irons are massive and amazing to see!

1 month ago

Nice hike, more moderate than hard, I was able to hike up and down in less than an hour, but definitely take some time to hang out at the top. Views of the flatirons are nice, and Boulder if you’re into that kinda thing.

hiking
2 months ago

Wouldn’t say is hard- solid moderate. Short. Trail crosses rock slide which is fantastic. Trail takes you to back of first flatiron, which cool, is bit of anticlimax...

windy at top. amazing views.
nice cool hike

hiking
3 months ago

Beautiful trail with some nice views near the top. The Flatirons are really cool-looking peaks! The trail is really well maintained and manageable to walk on, even during the steeper points. Lots of switchbacks toward the top made the ascent easier than I anticipated. Only one very brief scrambly section.

We stopped at the very top of the second Flatiron (the trail seemed to peter out a few meters behind it) and came down via Bluebaird Trail. Passed lots of other people in the morning, but no congestion.

3 months ago

Short and steep, a good workout, with some good views. Not so crowded, but it was a weekday in early November.

3 months ago

lit trail, scaled the face

hiking
3 months ago

Pay ParkMobile to park by the hour during certain high seasons (memorial to Labor Day).

Stop to read the day’s updates on the trailhead signs to remain in the know and choose your route. I recommend taking a picture of the map.

Dogs must remain leashed unless they have a very specific boulder tag and have gone through a training program, otherwise you will get a ranger ticket and ruin it for others. Please respect this rule to preserve wildlife and rare ground nesting birds that we are lucky enough to have in our area. Rattlesnakes and bears/cats do occur but you can read about their more prevalent time of year and how to avoid.

Before you come with your dog ensure you have at least 4 plastic grocery bags with you or poop bags. After picking your dogs poop up, squeeze the air out before tying it up. Then place it within another bag to prevent too much odor. Plan on carrying your poop ALL the way to the trash in your hiking pack. When people leave bags leave lining and dotting the sides of the trail, it disrupts natural scents for local wildlife and disrupts their environment. If your dog poops early on as most do, just walk it back to the trash can at the trailhead and get your extra steps in. Keep your extra bags in can you need them later on the hike.

The path up to the 2nd flatiron is beautiful. The initial 1+ mile is mostly groomed path at an incline. When you venture further, you begin to notice many switchbacks as you start to elevate. There are a few areas that definitely involve scramble and use of your hands for balance if you intend to summit. Bring a snack to enjoy up top, and pack all the trash out with you.

In late October, we did not feel that 2 Liters water was enough per person. Next time I will bring 3 liters for each person. Just be on the safe side and enjoy training with a little extra weight. There is a nice frost-resistant water fountain at the trailhead along with primitive bathrooms if the ranger house is closed when you go.

3 months ago

a bit crowded but great scramble & traverse opportunity @ top!

hiking
3 months ago

Very nice hike. Sort, so added some additional trails in the Chautauqua area. Left at 8 and had reasonable traffic on the way up. Very busy on the way down.

hiking
3 months ago

Hiked on October 19th. Trail was great. A little steeper than I thought but an awesome hike.

hiking
4 months ago

Amazing trail very well worth it

4 months ago

My husband, friend, and I hiked this back in 4/2017. It was pretty much my first “real” mountain hike and will always be one of the most meaningful to me. I have a thing with heights but we made it to the tippy-top of the 2nd flatiron! If you’re planning on “celebrating” definitely wait until the top haha. Even if you’re not the most experienced hiker and it’s intimidating, go all the way - you won’t regret it. I definitely recommend appropriate footwear and gear (lots of water if you’re not used to the elevation)! We will be back!!!

hiking
4 months ago

Gorgeous views, different types of terrain on the way up. Lots of traffic for a reason. This is a must in the Boulder area even if once. The Flatirons are stunning. The ascent is steep at times, but it’s manageable even for this visitor from out of state.

hiking
4 months ago

Step clim but completely worth the views! Very transited.

hiking
4 months ago

If you’re acclimated to higher elevations or go hiking frequently this trail isn’t very hard. The terrain is interesting and has great views from the top. I went around 10am on a Friday morning and the parking lot and lower trail was VERY crowded.

4 months ago

Definitely a harder hike with the steep inclines. It was very busy when we went. But well worth it when you get to the top.

4 months ago

Bring water for this hike! A little tough on the way up but definitely worth it! Very heavily trafficked but the climb is so great.

4 months ago

Rugged trail. Amazing views.

hiking
5 months ago

Good workout, kinda shaded making it nice during summer heat. Great views from top.

hiking
5 months ago

Challenging with some nice portions of rock scrambling. Views at the top are a little obscured and trail is a busy. Definitely worth it though!

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