23 Boulder Hikes & Trails for All Levels

by Mary Howard
- June 15, 2024

I’m a Colorado local who loves the outdoors and in this guide, I’ll point you to the absolute best Boulder hikes!

This round-up features Boulder hiking trails for every skill level and preference. Many trailheads are minutes from downtown, while others call for an exciting day trip.

Sights include summits, canyons, waterfalls, rock formations, wildflowers, wildlife, and more! I cover all of the popular trails in the area, plus lesser-known places to break away from the crowds.

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23 Best Boulder Hikes

Mount Sanitas and Sanitas Valley Loop

A challenging, rocky route with views of Boulder, the Flatirons, and the Continental Divide.

Mount Sanitas is one of my favorite things activities do in Boulder. It’s a short, challenging trail that gains 1,257 feet of elevation in its 1.3-mile ascent. To start, park in the lot or along Sunshine Canyon Drive. You’ll find three north-facing paths, all of which lead to Mount Sanitas Trail.

Expect steep, rocky steps for much of the climb. You can shorten the hike to 2.6 miles by turning around at the summit, but I recommend taking the loop trail. Do so by heading east down the mountain, then heading south through Sanitas Valley Trail.

Red Rocks Trail

Choose your own adventure on this hike that meanders past tall sandstone fins.

Red Rocks Trail is accessible via the Centennial Trailhead, found south of Mount Sanitas. Park along Sunshine Canyon Drive or in the aforementioned lot, where you’ll find bathroom facilities. There are also restrooms at the far southern end of this loop, known as The Peoples’ Crossing.

Take the loop in either direction to discover many interesting red rock formations. Several are large sandstone fins, and many grant scrambling and bouldering opportunities. Note that there are many spur trails in this area, allowing you to shorten or lengthen this hike.

🛏️ Basecamp:Foot of the Mountain Motel is adjacent to The Peoples’ Crossing, granting access to this trail and other nearby activities. It’s one of the best places for staying in Boulder!

Pine to Peaks Loop

A short trail that caters to all abilities, granting scenic views from the top of Bald Mountain.

The Pine to Peaks Loop is located in the Bald Mountain Scenic Area. It’s lightly trafficked despite its proximity to downtown Boulder. A parking lot is accessible from Sunshine Canyon Drive.

Beginner hikers and families will especially enjoy this short lollipop loop. It gains just under 200 feet of elevation in its 1.1-mile length. I recommend hiking counterclockwise for a more gradual ascent up the 7,139-foot Bald Mountain. Views of the surrounding Rocky Mountains are most impressive from this vantage point.

Wonderland Lake

A family-friendly hike on the northern end of town, popular among bikers and birders.

Those hiking with kids will love the flat, partially-paved path around Wonderland Lake. Some sections feature gravel or dirt surfaces. It’s accessible to strollers and wheelchairs, though all-terrain tires may be necessary. Biking is also popular on this route.

The trailhead and parking lot are found along Broadway, just north of downtown Boulder. Start the lollipop loop clockwise, heading south along the water’s edge. Continue following Wonderland Park Trail around the lake, which briefly joins onto Utica Avenue.

Chautauqua Trail

Take photos from the base of the Flatirons, or access several longer routes in Chautauqua Park.

Chautauqua Trail is one of the most popular Boulder hikes, as it grants stunning views of the iconic Flatirons. It’s also easily accessible with a dedicated parking lot and ample street parking.

Photoshoots for homecoming, graduations, and even weddings often take place near the trailhead. Wildflowers decorate the valley in the summer months, and prairie grasses turn shades of yellow in the fall. The hiking trail also connects to several other routes in Chautauqua Park, including the three named below.

📚 Related Reading: Check out my guide to the 31 best hikes close to Denver!

First and Second Flatirons Loop

See Boulder’s famous feature up close, and even reach the summit via a multi-pitch climb.

a man and a woman walking down a path in the woods

The route to First and Second Flatirons starts identically to the above. Park at the Chautauqua Park lot, along Baseline Road, or in the adjacent neighborhood side streets. Then hike along Chautauqua Trail, which turns into Flatirons Loop Trail after the Bluebell Baird Trail junction.

You’ll encounter another junction 0.1 miles after. Veer right (west) to join First and Second Flatiron Trail, then ascend several switchbacks for a close-up look at these massive rock slabs. Climbing is popular at the Flatirons, and guided tours cater to all experience levels.

On your descent, join the Bluebell Baird Trail. You’ll come across picnic tables, followed by restroom facilities near the Mesa Trail junction. Stay on Bluebell all the way back to the lot.

Royal Arch

This tough climb up Sentinel Pass leads to a stunning natural arch that stands 30 feet high.

Royal Arch Trail is very steep, gaining just under 1,500 feet of elevation across 1.7 miles. But the scenery is well worth the effort, as you’ll witness views of the Flatirons, the city of Boulder, and a stunning natural arch. In my opinion, it’s one of the best hikes in Colorado!

You can reach Royal Arch Trail by hiking Chautauqua Trail to Bluebell-Mesa Trail. But Bluebell Hiking Trail is the more direct route from the parking lot. Pass the picnic area previously mentioned, then begin the tough ascent up Sentinel Pass. Expect stone stairsteps much of the way, as well as a few creek crossings.

The top of Sentinel Pass is a false peak. From here, drop around 140 feet in 0.1 miles, then climb the final 0.2-mile stretch to reach the arch. This natural wonder demonstrates why Boulder is one of the best destinations to visit in Colorado!

👉 Pro Tip: My general rule of thumb is anything that gains 500+ feet of elevation in a mile is a difficult trail. But remember, I’m an experienced hiker and Denver local who’s adjusted to the altitude!

Boulder Mesa Trail

A lengthy path at the base of the foothills featuring multiple entry points.

Mesa Trail is a long path that runs along the Boulder foothills. Chautauqua Park lies at its north end, and South Mesa is its southern terminal. This is a 13.2-mile route out and back. Though, Mesa Trail is very customizable with multiple entry points.

The toughest segment from Chautauqua Park is the first 1.3-mile stretch. From South Mesa, the first 1.7-mile section is difficult, gaining 724 feet of elevation. Enjoy one of the easier segments of Mesa Trail by starting from NCAR Road—which is also how you access Mallory Cave.

🐕 Off-Leash Dogs: Consider another route if you or your dog may be uncomfortable with off-leash pets. This trail map highlights what hiking trails permit the city’s Voice and Sight Program.

Mallory Cave

A steep ascent that leads to panoramic views, climbing routes, and a cave entrance.

Some regard Mallory Cave as a moderate trail—and the first mile may deceive you into thinking so. But the remaining 0.6 miles to the summit are steep, totaling 732 feet of elevation gain.

Start by parking at the large lot adjacent to the NCAR Mesa Laboratory. Follow NCAR Trail, which turns into Mallory Cave Trail at the Mesa Trail junction. Tight switchbacks lead to Mallory Cave, though it’s permanently closed to protect its resident bats. However, you can peer into the entrance and enjoy panoramic views of Boulder.

Trad, sport, and top rope climbing routes are also accessible via Mallory Cave Trail. Watch climbers ascend red rock slabs in the Der Zerkle and Dinosaur Rock areas, or join in on the fun.

👉 Don’t Miss: The National Center for Atmospheric Research (NCAR) Mesa Laboratory has free exhibits you can view on weekdays. All ages will find its weather research fascinating, and it’s one of the best things to do in Boulder with kids!

Chapman Drive and Tenderfoot Trail

A picturesque hike at the top of Flagstaff Mountain, which is especially pretty at sunset.

Chapman Drive and Tenderfoot Trail is a hidden gem among Boulder hikes. You’ll see several other vehicles as you drive up Flagstaff Mountain and at the Realization Point parking lot. But crowds significantly thin from there.

Heading clockwise, this loop begins with a gradual descent down Chapman Drive. The forest opens up to multiple viewpoints of the Continental Divide and its snow-capped peaks. Tenderfoot makes up the east-facing side of the loop, granting even more stunning scenery.

Green Mountain West

Enjoy panoramic views of far-off peaks which you can identify using a unique geological marker.

Green Mountain West Trail begins two miles further west from Realization Point. Street parking is available along Flagstaff Road, but note that this is one of the most popular hiking trails in Boulder. Arrive early to find a spot and avoid crowds.

The first 1.3 miles of Green Mountain West Trail are very moderate, but the remaining 0.7-mile stretch is quite steep. Expect to gain 442 feet of elevation in this section. Views from the Green Mountain summit are breathtaking. You’ll find a geological marker that specifies the names and elevations of nearby peaks—which include several Colorado 14ers.

Bear Peak via Shanahan Ridge

This challenging hike to the top of 8,458-foot Bear Peak is not for the faint of heart.

Shanahan Ridge leads to Bear Peak and has two trailheads—one on Cragmoor Road and another on Lehigh Street. Both are in the Devil’s Thumb – Rolling Hill residential neighborhood, just south of NCAR Mesa Laboratory.

Take either the Cragmoor Connector or Lehigh Connector west on Shanahan-North Fork Trail. This turns into Shanahan-Mesa Trail at the Mesa Trail junction. It quickly becomes Fern Canyon Trail at the Fern Canyon junction. You’ll encounter a series of switchbacks, then veer left (south) and ascend to the summit of the 8,458-foot Bear Peak.

Note that this hike gains a massive 2,674 feet of elevation in 2.5 miles. Excess water should definitely be part of your hiking essentials checklist when hiking Bear Peak Trail!

South Boulder Peak via Homestead Trail

A strenuous hike to the top of Boulder’s tallest peak, standing at 8,549 feet above sea level.

South Boulder Peak is another challenging hike that gains 2,880 feet of elevation in 4 miles. It begins at the South Mesa Trailhead, the southern terminus of Mesa Trail. This is just outside of Eldorado Canyon State Park, and restrooms are available at the trailhead.

Follow Mesa Trail for only a short distance, joining Homestead Trail at the junction. Reconnect with Mesa Trail at the 1.6-mile marker, then veer left at the next junction, joining Shadow Canyon South Trail. Turn left onto South Boulder Peak Trail around the 3.8-mile marker and the summit is just up ahead!

Rattlesnake Gulch

A popular hike offering some of the best views in Eldorado Canyon State Park.

Rattlesnake Gulch Trail gives a great overview of Eldorado Canyon State Park, one of the best state parks in Colorado. Enjoy spectacular views of the canyon and the Continental Divide. Take the short spur trail to the historic Crags Hotel ruins. Here, interpretive signage explains its history and the fire that destroyed it.

The trailhead is located just a quarter-mile east of the visitors’ center. The well-marked path is straightforward, but note that the 2.9-mile length refers to the out-and-back route. Hikers can lengthen this to a 3.6-mile loop, completing the entirety of Rattlesnake Gulch Trail. But note that closures occur seasonally in this additional section due to nesting raptors.

Eldorado Canyon Trail

Whitewater rapids and canyon views make this one of the state park’s most amazing hiking trails.

Eldorado Canyon Trail is another popular pick in this state park. It’s more challenging than the former hike, gaining just under 2,000 feet of elevation. But you’ll be rewarded with views of the rushing South Boulder Creek and the surrounding Rocky Mountains.

Begin your journey by parking at the visitor center, where you’ll also find restroom facilities. Cross Eldorado Springs Drive, then stay on Eldorado Canyon Trail for the entire hike. You’ll ascend several switchbacks and likely need to catch your breath—but lovely scenery is around every corner. Hands down, this park is one of the best day trips from Boulder.

🛑 Warning: Moose have been seen on this trail and mountain lions are known to inhabit the area. Keep your distance and follow wildlife safety tips!

Flatirons Vista

A family-friendly trail featuring wildlife and expansive views of the Flatirons.

The Flatirons Vista Trailhead is located along South Foothills Highway, just east of Eldorado Canyon State Park. Here, hikers can enjoy panoramic views of the Flatirons. Wildlife like elk and coyotes have been spotted on this trail. Free-range cattle and people on horseback often populate the area, too.

It’s an easy, clearly marked loop that gains minimal elevation—285 feet in total. Flatirons Vista is a great pick for families, and its accessibility makes it one of the best winter hikes near Boulder, Colorado. Though, note that this route experiences closures due to mud after heavy rainfall.

Boulder Falls

Stretch your legs on the way to Nederland and witness a beautiful 70-foot cascade.

Some may argue that Boulder Falls is more of a roadside attraction than a hike. Granted, its 0.3-mile route is brief. But our “best hikes near Boulder” round-up would be incomplete without this iconic site.

It’s located on Boulder Canyon Drive, almost exactly between Boulder and Nederland. Park along the road and enjoy stretching your legs on this family-friendly trail. The 70-foot Boulder Falls is especially impressive during spring when it swells due to snowmelt.

Lost Lake via Hessie Trail

A beginner-friendly backpacking route that leads to a sparkling alpine lake.

a man riding a bike down a snow covered slope

The Hessie Trailhead is just west of Eldora, a small community 20 miles west of Boulder. It’s a highly popular destination in the summer months. Parking is very limited along Fourth of July Road. Though, visitors (including leashed dogs) can take the free shuttle to the trailhead. Park at Nederland High School and catch a ride Friday through Sunday from May 26 to October 8.

From the trailhead, take Devil’s Thumb Trail—which becomes Devil’s Thumb Bypass after the Middle Boulder Creek crossing. Veer left at the junction, joining Lost Lake Trail which will lead you in a loop around the water’s edge. Eight backcountry campsites lie here, which are available on a first-come, first-serve basis.

🎒 Love Backpacking? Don’t miss my guide to the best backpacking packs of 2023! I explain why the Osprey Eja (women’s) and Osprey Exos (men’s) are my favorites. Plus, I share several other personally-tested recommendations.

Arapaho Pass and Lake Dorothy Trail

An alpine lake hike in the Indian Peaks Wilderness, complete with a campground at the trailhead.

The Arapaho Pass Trailhead lies 4 miles northwest of Hessie Trailhead. It’s at the very end of Fourth of July Road. Here, you’ll find restroom facilities, picnic tables, and Buckingham Campground, home to ten first-come, first-serve sites. I recommend packing your camping essentials and making this an overnight experience!

The moderate trail is straightforward, leading to the top of the 11,907-foot Arapahoe Pass. From there, turn left (west) onto Caribou Pass Trail to reach Lake Dorothy. Note that this trail is best experienced in the summer, as Fourth of July Road closes seasonally. Plus, high-elevation areas of the Indian Peaks Wilderness are often covered in snow, even through June!

📚 Related Reading: Best Time to Visit Colorado

Lake Isabelle via Pawnee Pass Trail

Camp and hike at the Brainard Lake Recreation Area, home to this picturesque alpine lake.

Lake Isabelle is located in the Brainard Lake Recreation Area. Its 50-minute commute from Boulder doesn’t deter visitors—in fact, this is one of the region’s most popular summer destinations. Timed entry parking reservations are required starting on May 25 through peak season.

Start by parking at the lot near Brainard Lake and Pawnee Campground, home to 47 sites and restroom facilities. Walk a short distance down Brainard Lake Road, past the Niwot Picnic Area, and to the Niwot Cutoff Trail.

This becomes Jean Lunning Trail at the northeast end of Long Lake—the second alpine lake on this route. Turn left at the junction, joining Pawnee Pass Trail. The scenic Lake Isabelle is one mile further ahead. Consider taking Pawnee Pass back to the Jean Lunning Trail junction. This grants adjacent views of Long Lake and its surrounding wildflowers.

Blue Lake via Mitchell Lake Trail

Hike past several alpine lakes—and check off an extra if you’re curious about what lies ahead.

Blue Lake is one of the most popular destinations in the Brainard Lake Recreation Area. Be sure to select the Mitchell Lake Trailhead when reserving your timed entry parking permit. This parking lot also has restroom facilities.

From the trailhead, follow Mitchell Lake Trail to—you guessed it—Mitchell Lake. The trail continues past several smaller pools, followed by the main attraction: Blue Lake.

This 6.2-mile route is a workout in itself, gaining just under 1,000 feet in elevation. But hikers can continue on an extra 0.4 miles to reach Little Blue Lake. Just be prepared for what’s nearly an extra 500-foot ascent!

Emerald Lake

A can’t-miss hike in Rocky Mountain National Park, featuring alpine lakes and abundant wildlife.

Emerald Lake is one of the most famous hikes in Rocky Mountain National Park. It can be crowded, but I’d recommend this trail above all else if you only have one day in the park. It passes three breathtaking alpine lakes—Nymph Lake, Dream Lake, and Emerald Lake. Its 3-mile length and moderate difficulty make it suitable for most hikers.

Plan ahead if visiting between May 26 and October 22, as you’ll need a Park Access+ reservation. Note that parking at the Bear Lake Trailhead is limited. You may need to leave your vehicle at Park & Ride, then take the free Bear Lake Shuttle to your starting point. Restrooms are available at the trailhead.

♿ Adaptive Hiking: Emerald Lake isn’t suitable for wheelchairs. But Bear Lake is accessible from this trailhead and offers stunning views of the Continental Divide!

Alberta Falls

A 30-foot cascade that’s iconic to Rocky Mountain National Park.

Alberta Falls is another popular trail in one of the best US national parks. Accessing this site in Rocky Mountain National Park is similar to Emerald Lake. A Park Access+ reservation is required during peak season and a ride on the Bear Lake Shuttle may be necessary. However, you’ll want to exit at the Glacier Gorge Trailhead.

Hike Glacier Gorge Trail, staying right at the Glacier Creek Trail junction. Continue along the well-marked, moderate path until you reach Alberta Falls, a gorgeous 30-foot cascade. Pack a picnic or plan for lunch in nearby Estes Park, full of other fun things to do.

👉 Pro Tip: Struggling to book Park Access+ reservations? Plan an evening hike, as reservations aren’t required after 6 pm.

FAQs About The Best Hikes Near Boulder

Is Boulder, Colorado good for hiking?

Boulder, Colorado is good for hiking, featuring more than 150 miles of hiking trails for all abilities [ source]. Some of the best hikes near Boulder include Mount Sanitas,Royal Arch, and Rattlesnake Gulch.

What is the best time of year to hike in Boulder?

The best time of year to hike in Boulder is fall, in my opinion. Hiking trails are often dry and accessible during autumn, and the weather is generally mild.

However, certain hikes near Boulder, Colorado are better in the summer. This includes Lake Dorothy in the Indian Peaks Wilderness and Lake Isabelle in the Brainard Lake Recreation Area. The same applies to Emerald Lake in Rocky Mountain National Park.

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Thanks for reading my guide to the best Boulder hikes. Stay safe and enjoy exploring those hiking trails near Boulder!

about me

Welcome to my travel website! I’m Mary Howard, an American who has been exploring the world full-time for 8 years.

Together with my husband, Intan, we often find ourselves in our second home, Bali, but our adventures take us to exciting destinations all over the globe.

Join us on our journey!