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Good trail for an afternoon hike nice and close to town. We did it when in town for Thanksgiving and it was a nice day. The view from the top is ok. You can see some snowy peaks if you look west from the top. The hike up is pretty steep; it's a good workout trail. In November, it was pretty icy on the way down to the valley where some parts were on a north-facing slant.

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...

on Green Mountain Loop

8 days ago

Beautiful morning with a nice amount of snow and a little ice. Bring your spikes.

windy at top. amazing views.
nice cool hike

Difficult & steep trail run, but well worth the efforts

Climbed 11/10/18 - Sanitas generally stays drier and more snow free compared to nearby mountains like Green or Bear which makes this a great mountain for a workout hike or trail run. Quick and easy. Always seems to be more crowed than Green or Bear. Views from the summit are only of Boulder and you cannot see anything west:(. Additionally the summit block is small and crowded which was an annoyance both times I climbed it. So this is a great workout mountain and is fairly fun but the views and solitude are lacking compared to neighboring mountains..

I have blisters on my feet, and I feel like I got hit by a train a day after. Will do again!!! ... when I’m in better shape.

Beautiful scenery, Tough as hell work out, wildlife... this was perfect. Bring snacks and lots of water... and pain pills.

Going counter clockwise on the trail was a bit difficult, the trail was tricky at times. Unfortunately I went on a cloudy day but if you are looking for a trail to get a sweat going this is a great one.

Did this trail when first visiting the area..definitely was a little challenging on the way up! Was a great workout and the view at the top is awesome.

We did this hike on thanksgiving day and we were happy to see many faces on the trail. It’s definitely one of the most gorgeous hikes we’ve ever done. Even in late fall with ice on the ground, this trail had a lot of scenery to offer. I’d say it’s one of the best hikes to accurately represent Boulder, as you see diverse rock giants throughout. We are quite fit so it wasn’t terribly difficult, but let’s be honest the way down was INTENSE! Complete and utter focus is required to make it down those huge rock stair cases. Saw a family of deer and that made my day.
Will be back in the spring time to see all the wildflowers bloom. You have to see this place!

This was a great workout. The views are amazing. There is lots of stairs and boulders to go over. A bit missing and icy on the back loop going down.

on Green Mountain Loop

hiking
27 days ago

Beautiful trail. Tough trail, a lot of uphill and tricky footing in places. Worth the climb for sure. Beautiful views! Be sure you have plenty of water.

hiking
27 days ago

did this a few years ago so going off of memory! I remember loving the views at the top but it was more difficult than I thought it would be. it is a crowded trail for good reasons. we hiked it during July and got stuck it two afternoon thunderstorms, looking back it's funny, but I remember being cold/wet then dry/hot! but that's not that unusual for Boulder

Well that was hard!

Really great views of Boulder. Definitely an asskicker at times, though not always. Trail was in good condition, with lots of people taking advantage of perfect hiking conditions.

Currently packed snow and ice on most of the trails. Microspikes recommended.

The definitive Boulder workout. One of the first to try if you are only here for a short while!

hiking
1 month ago

A fantastic climb with a great summit.

Great trail and beautiful views.

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.

Amazing fog this am with snow flakes. Trails dry with friendly people and amazing views. Happy Thursday m8y's Oiiiii

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

Decent hike that starts with a mild incline, then fluctuates with ups and downs. Nice mellow hike, no real view points. Good for staying close to Denver. Some of the trails are blocked off so it was easy to get turned around, navigating with AllTrails was needed to get to the right place.

Lots of steps up (45 min) but worth the reward. Easy hike down.

trail running
1 month ago

Took me 3 hours 48 min. I ran ~4 miles and hiked the rest. Good views at beginning and end. Middle chunk gets a little bland.

Great views of Boulder. Decently trafficked by people and easy to find the trail. Around the peak it does get pretty rocky so good shoes and sure footing is highly recommended. Haven’t hiked in awhile and did the loop in a 1 1/2 hours with a longer break at the top.

Gorgeous trail. Strongly disagree with the "hard" rating-- it's difficult for a relatively short period of time, so I think it's more in the moderate category. It was actually rated moderate on alltrails until about a month or two ago.. not sure why it was changed.

This trail is short, energizing and has better views than some of the even harder trails in Boulder.

gnarly trail, view at top legendary

lit trail, scaled the face

If you are going to do this hike as a loop , I would recommend going up Mount Sanitas and returning Sanitas Valley .

Great hike.

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