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Mount Sanitas, East Ridge, and Sanitas Valley Loop, City of Boulder Open Space and Mountain Parks, Boulder, Colorado, United States | AllTrails.com

Mount Sanitas, East Ridge, and Sanitas Valley Loop

Length3.2 miElevation gain1,256 ftRoute typeLoop
• Access Dogs: The City of Boulder has specific regulations for dogs that vary seasonally and by trail section in this area. For more information, please visit: https://maps.bouldercolorado.gov/osmp-dog-regs/?extent=-11721507.929%2C4864536.8087%2C-11719350.9716%2C4866519.3941%2C102100&_ga=2.58734957.1598885098.1693000722-610295925.1690907618 • Fee Information: The City of Boulder requires a parking fee at this trailhead for non-residents. For more information, please visit: https://bouldercolorado.gov/services/osmp-parking-permits-and-fees • Boulder Open Space and Mountain Parks charges a seasonal fee to park at the Chautauqua Trailhead. There is also a seasonal shuttle available. For more information, please visit: https://bouldercolorado.gov/trailhead/chautauqua • Seasonal Closure: This area is subject to seasonal closure due to muddy conditions. For more information, please visit: https://bouldercolorado.gov/osmp/temporary-closures or text “OSMP” to 888-777 to sign up for text updates about muddy trail closures. Mount Sanitas is a must-do hike if you’re in Boulder! The trailhead is centrally located close to downtown Boulder. You can walk from downtown to the Centennial Trailhead on Sunshine Canyon Drive from downtown Boulder. The trailhead has a small parking area that gets full quickly in the morning, so it’s best to arrive early. If it’s full, there is more parking on the road. From the trailhead, you'll continue north on Mount Sanitas Trail. Eventually you’ll reach the summit of Mount Sanitas. Enjoy the view of Boulder, and the mountains to the north and west. To descend back to where you've parked, continue east on the East Ridge Trail. This short trail decreases in elevation rapidly, eventually reaching the Sanitas Valley Trail. Take a right on this trail, which will lead you back to the parking area.
HikingRunningDogs on leashForestViewsRocky
Mount Sanitas, East Ridge, and Sanitas Valley Loop map
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10326 reviews
November 24, 2024Hiking
Great conditionsGreat views

Easy to moderate hike, depending on fitness. Great views of Boulder. Small lot that fills up fast on the weekend. Trail is pretty crowded

November 23, 2024Hiking
Easy to parkNot crowdedDog-friendlyGreat conditionsGreat views

Pretty much straight up to the top with almost 1300 feet of elevation gain in a mile and a half, and then the same back down but well worth it and the trail fairies have done such a great job on this trail! Deeply indebted for their great work!

Difficulty: Hard
November 21, 2024Hiking
Not crowdedBathrooms availableDog-friendlyGreat conditionsGreat views

Sweet views

Difficulty: Hard
November 21, 2024Hiking
Dog-friendlyGreat conditionsGreat views

Popular loop with fun inclines and flat downhills. Awesome views too. No snow to be seen.

Conditions: Dry ground
November 17, 2024Hiking
Good conditionsGood viewsEasy to parkDog-friendly

Started at 0730… moderately crowded already on a Sunday. Took the trail to the R which makes it more moderate going up. Downloading the map is helpful for the scramble sections near the top. Came in just over 4 mi and 1300 gain.

Difficulty: Moderate
November 11, 2024Hiking
Easy to parkBathrooms availableGreat conditionsGreat views

Incredible trail. The incline is so serious in the beginning. Rewarding and varied views

November 10, 2024Hiking
Great views

Very difficult and very muddy on the way down

Difficulty: Hard
November 5, 2024Running

Wowee! What are you this morning!

November 3, 2024Hiking
Dog-friendlyGreat conditions

Steep climb up with some scrambling

November 2, 2024Hiking

Perfect conditions still. Would take approximately 2hrs to finish. Try to plan the hike in a way you finish before sunset.

Difficulty: Moderate
October 27, 2024Hiking
Dog-friendlyGreat views

This trail is difficult! Even after reading others reviews I underestimated how challenging it would be. But when you do make it to the top, the fruits of your labor is well worth the INSANE views! Take lots of breaks and pack a snack to refuel when you’re at the top.

October 26, 2024Hiking
Bathrooms availableDog-friendlyGreat views

Absolutely tremendous hike. The views are amazing, and you can see the fall foliage down below. Strongly recommend going clockwise.

Difficulty: Hard
October 24, 2024Hiking
Easy to parkNot crowdedDog-friendlyGreat conditions

Gorgeous Trail, that is steep right off the bat and stays that way until you reach the top, and then steep and rocky for about half of the way down before you hit what’s effectively a dirt road that is much easier. Wear good sturdy hiking boots or trail shoes with good ankle support and bring lots of water! If you bring dogs, make sure they have plenty of water too as it’s a hot trail when it’s sunny.

Difficulty: Hard
October 24, 2024Hiking
Easy to parkNot crowdedBathrooms availableDog-friendlyGreat views

View is great but it gets very rocky if you take the right entrance vs left going up. I would consider this a difficult hike. A lot of dogs are off leash but they are usually very polite/friendly. We drank about a bottle of water each. Views are lovely. No water in the stream (if that was a stream i saw towards the end).

October 23, 2024Hiking
Bathrooms availableGreat views

Great hike! Pretty intense elevation gain going clockwise, or during the last quarter mile going counterclockwise. Had no problems with traction with hiking boots. Saw a few deer at the summit too. Great views from the top and would recommend. Took just over an hour to the top going clockwise for someone with moderate fitness level. Arrived at 9:30am on a Wednesday to a full parking lot so go early or pray for good luck with someone leaving

October 22, 2024Hiking
Good conditionsGood viewsBathrooms available

Parking is limited, but mid day on a Tuesday it was fine. I can imagine it's impossible on a weekend. Went clockwise (left side of the loop) Step trail, going up was 90% staircase. Not a lot of shade, but being that it's fall it was not too hot despite full sun. Really nice views! Going down was loose flagstone and sand for about the first 1/3 of the way, then easy the rest of the way to the parking lot. If you are not that sure footed, a hiking stick would be a very good idea.

Parking: Free, Small lot
October 22, 2024Hiking
Good conditionsGood viewsEasy to parkNot crowdedDog-friendly

Quite a few steep steps. A couple times I had to scramble. Went clockwise and got confused a few times where I lost the trail, especially in a blind corner. Otherwise gorgeous views!

Conditions: Dusty, No bugs, Dry ground, Well maintained
October 21, 2024Hiking
Easy to parkNot crowdedGreat conditionsGreat views

Short and appropriately challenging for someone not used to elevation. Doable and enjoyable.

Parking: Free, Medium lot
October 20, 2024Hiking
Easy to parkDog-friendlyGreat conditionsGreat views

Some steep and rocky parts, but not dangerous

Difficulty: Moderate
October 19, 2024Hiking
Dog-friendlyGreat conditionsGreat views

Bring the trecking poles, quite rocky in parts!

October 19, 2024Hiking
Great conditionsGreat views

nice moderate climb. Went clockwise which was steeper climb easier decent and recommend that route. Not too crowded for a Saturday in boulder

Difficulty: Moderate
October 19, 2024Hiking
Bathrooms availableGreat conditionsGreat views

Short trail, but a good workout. Like everyone says, I'd recommend going clockwise. Did it in 1:15. Saw several people slipping around that weren't wearing hiking shoes or boots.

October 18, 2024
Easy to parkNot crowdedBathrooms availableDog-friendlyGreat conditionsGreat views

Great trail, well-traveled and moderate to hard IMO. Started at Centennial trail head and hiked clockwise. No exposure to speak of on way up, biggest consideration is lots of sand and loose gravel on sloped red rock on ascent, slippery at times. Descent down switchbacks into Sanitas valley is steep with some awkward steps and transitions, watch you don’t catch your boot on roots and rocks here. Otherwise, a really beautiful not-too-strenuous hike with big views and close to downtown Boulder!

October 18, 2024Scenic driving
Not crowdedBathrooms available

As someone not from a mountainous area, and this being the first mountain I’ve ever hiked, the trail loop could’ve been marked a bit better. It’s a challenging hike. At times it felt like i was bouldering because of how steep the trail got at times lol.

October 16, 2024Hiking
Not crowdedDog-friendlyGreat conditionsGreat views

Challenging! Rocky. Especially towards the.

October 15, 2024Hiking
Easy to parkNot crowdedBathrooms availableDog-friendlyGreat conditions

Great quick hike with my dog. We did the counterclockwise loop with a good little incline to start. Nice view of boulder and the foliage that’s left

Difficulty: Moderate
October 15, 2024Hiking
Great conditionsGreat views

Leg burner on the way up, but definitely worth it! Midday on a Tuesday, parking was packed but I had the trail to myself a good bit of the time.

Parking: Free, Medium lot
October 10, 2024Hiking
Dog-friendlyGreat views

I thought I was dying throughout but I made it to the peak and completed the entire trail. Tough trail, and pretty steep at some points, made me feel accomplished,

Difficulty: Hard
Not crowdedDog-friendlyGreat conditionsGreat views

Tough trail, loose rock on descent. Great views though.

Parking: Free, Medium lot
October 4, 2024Hiking

Steep and rocky. A great workout.

Difficulty: Hard
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Frequently asked questions about Mount Sanitas, East Ridge, and Sanitas Valley Loop

What's helpful to know about this trail?

Head out on this 3.2-mile loop trail near Boulder, Colorado. Generally considered a challenging route, it takes an average of 2 h 15 min to complete. This is a very popular area for hiking and running, so you'll likely encounter other people while exploring. The trail is open year-round and is beautiful to visit anytime. Dogs are welcome, but must be on a leash.

What is the expected weather this week for Mount Sanitas, East Ridge, and Sanitas Valley Loop?

Expected weather for Mount Sanitas, East Ridge, and Sanitas Valley Loop for the next 5 days is:
  • Tue, November 26 - 41 degrees/rain/snow showers
  • Wed, November 27 - 30 degrees/snow
  • Thu, November 28 - 32 degrees/sunny
  • Fri, November 29 - 36 degrees/mostly sunny
  • Sat, November 30 - 34 degrees/mostly sunny