Explore To Do Someday - view hand-curated trail maps and driving directions as well as detailed reviews and photos from hikers, campers and nature lovers like you.

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Good hike and close to Boulder. Start early - you can either do out and back (starting clockwise) or loop (starting counterclockwise). First .5 mile of counterclockwise is flat, wide, gravel. The rest of it is a lot of switchbacks and exposed, so wear sunscreen and start early.

I usually don't have to stop and I took a few breaks this time. Great workout and doesn't take too long. Start early!

Some hard steps in the beginning then trail. Bikers are hard core as they pass!

it says moderate, but we thought it was closer to hard. beautiful hike, though, some stunning views of the city when you first start out. from the top you can see Golden to the left, and way in the back you can see downtown Denver, so you really can see it all.
the sun would beat down during the climb up, and then In the forest it cooled down.

hiking
2 days ago

Love this hike! The flowers are always amazing even after peak season. It’s a steep climb at times but the beauty is worth it. It’s easy to get to from Denver but can be crowded on the weekends. That is the only reason I didn’t give it 5 stars.

Excellent trail! we did the first leg to the peak about 3 miles. mostly open until you start the climb. Climb was challenging over rocks, right turns. Peak had amazing views. Took Lion's Lair trail back down and this leg was mostly paved but a long 5 miles or so. Overall a really nice park in Boulder with several interesting trails.

I've only hiked this trail once and it is a really cool trail, especially 12 minutes away from my house in the city, but the main drawback for me is all the bikes. It's a very popular MTB trail and I had to pause pretty much every other minute to let a bike go by. A few bikes hurtled toward me and expected me to lunge out of the way. Overall it was hard to settle into the hike itself.

on Butler Gulch Trail

4 days ago

Perfect strenuous hike not far from Denver. The last half mile is deceivingly steep but very doable and worth it. Just hard enough to make you break a sweat and need a breather but not so much that you want to stop. Being above the tree line for the last half mile gives you great views of the surrounding ranges. Gorgeous hike. Highly recommend for a good sweat! In and out with a stop at the top for snacks in 3 hours.

hiking
5 days ago

The hike is okay. The 'castle' ruins are really neat!

on Butler Gulch Trail

hiking
5 days ago

The trail starts out a bit steep, levels out a bit, and then returns to a decent climb to get to the top. My husband and I hiked this trail, to the waterfall, with our two kids, 7 and 10 year old. It was about 3 mi., round trip, with a 1000 ft. elevation gain (The cirque is a bit further with another 500 ft. elevation gain). The wildflowers were past their peak but there were still plenty to enjoy.

This is our third time doing this Centennial Wildflower Hike and I would have to say that we better enjoy it earlier in the season when water crossing are more plentiful and the colors are off the wall. Today's hike was dryer, still beautiful, and hot. Go in July.

I have to say, there were quite a few people on the trail. This was the busiest I have ever seen it. BIG clap of appreciation goes out to all of the folks picking-up after their dogs. There were some bags of dog poop along the trail going up. When I came back down, they were gone! That's not to say that there weren't several piles left all around the trailhead, but it sure was nice to see responsible dog owner's making a difference in the way our trails are being used and abused by cleaning up after their pets. Thanks!

Quintessential Boulder hike. Went clockwise today - I prefer to tackle the big “steps” on the ascent and come down through the valley. Always nice to have bathrooms (across the street from the trailhead.) Friendly faces and interesting terrain. A perennial favorite.

Great hike. A little crowded on weekends but worth it.

road biking
8 days ago

A very enjoyable loop through some widely differing terrain. Some beautiful houses and parks as well as many assorted trees along the trail. Trail itself goes from gravel, sometimes deep, to concrete paths. Wife didn't like loose gravel as she slid a few times.

"Stairmaster Sanitas" is a great place to get a very real workout in. We are in decent shape and climbed up Sanitas and went back around the valley loop trail within 2.5 hours. I would categorize this as "moderate to hard" given a few of the rocks you have to scramble over and how steep it is. While you can carry a child on a backpack up an down, it's not the greatest one to choose for that since you might have to shuffle a bit over rocks, etc.

Great scenic trail. Seems crowded on weekends.

You want wild flowers then go here!!!

Also very underrated waterfall, photos don't do it justice.

First old mine is cool, second is not.

Steep trail, but beautiful waterfall early on and great tree coverage at the start. “Lake” and mine at the top are so so.

Good hike. Would like to crest the peak next time

hiking
10 days ago

Very very pretty!

Challenging in some areas for novice hikers but overall a great place to hike!

hiking
12 days ago

Hiked on 8/8/2018. I agree that the trail should be marked moderate. Still some nice flowers around. Skies were hazy due to smoke. Thus, visibility was not as great as it should be. Continued on to the CDT and Jones Pass for a nice round trip. Jones Pass was clear of all snow drifts. I couldn't find a clearly marked route to the CDT so I just picked what appeared to be the least steep route up to the ridge.

Great hike!

I started up the Sanitas Valley Loop first. Beautiful views of urban Boulder and a smattering of homes in the hills. The moderate valley trail gives way to some steep inclines as it connects with the East Ridge trail. I was visiting from Atlanta so I had to catch my breath and steady my footing as the trail ascended. Had to get used to the change in altitude. Plan to take your time navigating the rocky, sometimes not well marked East Ridge trail if your new to it and out there alone. I got out early in the am and had a few hikers help me find the trail but I can see that this trail gets very well populated after mid morning. At the top of Ridge Trail I met some nice folks who directed me to Lion’s Lair trail just beyond the summit for a good trail run. This trail was pretty smooth and the decline makes for a steady tempo run. Don’t get too comfortable because the switchbacks will keep you on your game. Overall a fun trail to test your trail speed. The locals pointed directed me on how to go from the Lion’s Lair trail to a narrow barely there trail that runs parallel to Sunshine Canyon Dr. This trail led to me the Centennial Trailhead parking lot. Overall awesome experience for a trail runner who wants to mix it up with a hike and run.

this incline is no joke! my poor pups paws were shredded after hiking these rocks. I ended up having to carry her 2 miles to the end. It was scenic but not as great as everyone makes it out to be.

Absolutely beautiful trail. Should be rated moderate instead of hard in our opinion

hiking
14 days ago

Wildflowers are past peak but don't let that stop you from enjoying this moderate hike that takes you above treeline.

Some cool mining ruins at the top and a very cool waterfall about 1.5 miles into the hike.

We arrived just shy of 9am Saturday morning and parked about one-third of a mile from the trailhead. It's a short, bumpy dirt road with a few potholes but nothing a sedan can't navigate - we saw several sedans in the parking area. Just drive carefully.

hiking
14 days ago

Nice day, but smokey skies from fires. Lots of wild flowers. Went all the way to the cirque.

Very challenging, beautiful hike! Once you’re at the top there’s an option to hike down towards Sanitas Valley Trail via East Ridge Trail. There was a point along East Ridge Trail that we felt did not have ample signage as we ended up going down the mountain off the trail. Other than that this trail was awesome!

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