Hiking around Boulder in Colorado takes you through open foothills, pine forests, and dramatic sandstone formations along the base of the Rocky Mountains. Trails climb above the city through areas like Chautauqua Park, where the iconic Flatirons rise sharply from the landscape. Along the way, wide views stretch across rolling hills, alpine peaks, and the vast plains to the east. With its mix of rugged mountain scenery and bright Colorado sunshine, hiking around Boulder feels energetic, scenic, and endlessly inspiring.

Your adventure begins as you arrive in the United States, where transport will be arranged to collect you from Denver. It’s well connected to Europe and the US, making your journey smooth and hassle-free. The meeting point, where we will start our journey to the mountains is in the city centre. The transfer will leave at 3pm and takes around 45 minutes. If you arrive before this time there are several luggage storage places so you can use the time to explore Denver. If you’re arriving a day early, we can suggest excellent accommodation options to ensure a relaxed start to your journey.
For the duration of the trip, you’ll be based in Boulder, surrounded by mountains and national parks. This means you won’t have to carry all your belongings from place to place, and after each day of hiking, you’ll return to the comfort of a warm shower and a cosy bed. Get ready for an unforgettable week exploring one of the US’ most spectacular mountain landscapes.

Click for Route Map : 10 km 4–5 h ~400 m ●●●○○ — Moderate
This classic Rocky Mountain National Park hike links two of the park’s most beautiful alpine lakes, offering a perfect balance of forest, waterfalls, and high-mountain views.
Starting at the Bear Lake trailhead, the path climbs gradually past Nymph and Dream Lakes, each framed by pine forest and reflections of Hallett Peak. From Dream Lake, the trail continues higher to Emerald Lake, a turquoise pool nestled beneath sheer cliffs and snowfields. The scenery here is spectacular year-round, with wildflowers in summer and ice patterns forming on the lake in winter.
From Emerald, it’s a short, rockier trail to Lake Haiyaha, a striking jade-green lake surrounded by massive boulders and towering peaks. The return follows the same route, with changing light giving the lakes new color and texture at every turn. It’s an accessible yet unforgettable hike that captures the very best of Colorado’s alpine landscape.

Click for Route Map : 13 km 5-6 h ~900 m ●●●●○ — Moderate
This demanding but rewarding loop combines two of Boulder’s most iconic summits, offering sweeping views of the plains, the Continental Divide, and the rolling foothills that define Colorado’s Front Range.
Starting from the South Mesa trailhead, the route climbs steadily through open meadows before entering pine forest and rocky terrain. The first major ascent leads to Bear Peak, where a short scramble brings you to a rocky summit with panoramic views over Boulder and the Indian Peaks. From there, a rugged ridge trail connects to South Boulder Peak, the area’s highest summit, where the quieter atmosphere and dramatic western vistas make it a perfect lunch spot.
The descent winds back through forested switchbacks and sunny clearings, often filled with wildflowers and the scent of sage. It’s a full, rewarding day on the trail that captures the best of Boulder’s mountain scenery — steep climbs, big views, and that unmistakable Colorado sunshine.

Click for Route Map : 13 km 6–7 h ~1,000 m ●●●●○ — Challenging
A classic summit in the Indian Peaks Wilderness, the South Arapaho Peak hike offers a full alpine adventure with glaciers, ridgelines, and sweeping views across the Continental Divide.
The trail begins at the Fourth of July trailhead near Nederland, climbing gradually through forest before opening into alpine meadows filled with wildflowers in summer. As you gain elevation, the views expand toward Arapaho Glacier and the jagged summits of the Front Range. Beyond the old mine ruins, the route steepens, eventually reaching a rocky ridge that leads to the summit at over 4,000 meters.
From the top, the panorama is extraordinary — Lake Dorothy below, the glacier shimmering in the sun, and an unbroken sweep of peaks stretching from Longs Peak to the Gore Range. Most hikers return the same way, though strong climbers can continue along the exposed ridge toward North Arapaho Peak. It’s a demanding but deeply rewarding day that captures the wild, high-altitude beauty of Colorado’s alpine country.

A free day in Boulder and Denver offers plenty of ways to relax, explore, and enjoy Colorado’s mountain culture without hitting the trails. In Boulder, you can wander the Pearl Street Mall for local shops, cafés, and street performers, or visit the Boulder Farmers Market if it’s open. The Chautauqua Park area is great for an easy stroll and mountain views, while the Boulder Dushanbe Teahouse offers a peaceful spot to unwind. You also can’t miss the stunning Red Rocks Amphitheatre.
If you head into Denver, there’s just as much to do. The city’s art scene thrives at the Denver Art Museum and the RiNo district’s colorful murals, while history lovers can explore Union Station or the Colorado State Capitol. Craft beer fans have endless options — Denver is famous for its breweries — and the city’s food scene ranges from lively markets to upscale dining. Whether you spend the day browsing galleries, relaxing by Boulder Creek, or enjoying a meal downtown, both cities capture the best of Colorado’s creative and easygoing spirit.

Click for Route Map : 13 km 5–6 h ~750 m ●●●●○ — Challenging
One of the most spectacular hikes in Rocky Mountain National Park, the Chasm Lake Trail offers dramatic alpine scenery and a close-up view of the sheer east face of Longs Peak.
The trail begins at the Longs Peak Ranger Station and climbs steadily through spruce and fir forest before breaking into open tundra with sweeping views of the surrounding peaks. Along the way, you’ll pass timberline falls and small alpine streams before the final steep section leads to Chasm Lake, set in a cirque directly beneath the towering Diamond of Longs Peak.
The setting is breathtaking — sheer cliffs rising from turquoise water, wildflowers scattered across rocky slopes, and marmots sunning themselves on the boulders. After taking in the view, return along the same route, with wide vistas of the Front Range unfolding below. It’s a demanding but unforgettable hike that showcases the rugged beauty of Colorado’s high country.

Click for Route Map : 16 km 5–6 h ~500 m ●●●○○ — Moderate
The Ouzel Lake Trail is a peaceful and scenic hike through the Wild Basin area of Rocky Mountain National Park, filled with waterfalls, forest, and alpine views.
Starting from the Wild Basin trailhead, the path follows North St. Vrain Creek through aspen and pine forest, with the sound of rushing water never far away. Along the way, you’ll pass a series of beautiful waterfalls — Copeland Falls, Calypso Cascades, and Ouzel Falls — each framed by mossy rock and cool mist. Beyond Ouzel Falls, the crowds thin as the trail climbs gently through open meadows and spruce forest toward Ouzel Lake.
The lake itself sits in a quiet basin surrounded by rugged peaks, with reflections of Mount Copeland and Ouzel Peak mirrored in the clear water. It’s an ideal spot for a rest or picnic before returning the same way. The combination of waterfalls, wildflowers, and mountain scenery makes this one of the most enjoyable moderate hikes in the park.

After an incredible week exploring the wild beauty of Colorado, it’s time to pack your bags and begin your journey onwards. Transport will be arranged to take you to the airport, or back to Denver. It’s recommended not to book a flight too early on the final day to give us time to get you back to the airport.
If you’re extending your stay, there are plenty of incredible places to explore beyond the mountains. We’d be happy to share recommendations to help you make the most of your time.
As you leave Boulder behind, you’ll take with you memories of emerald lakes, snowy peaks and unforgettable adventures in one of America’s most breathtaking landscapes. Until next time!
What's Included?
- Accommodation (Twin Room)
- Transfers
- Expert Guided Hikes
- Transport to and from Hikes
- Breakfast
- Park Entrance Fees
- Hiking Friends
Important Info
Accommodation – Fairfield Inn & Suites, Boulder
Meeting Point – Union Station, Denver
Nearest Airport – Denver International Airport
Airport Transfers – Taxi (20 mins, £30-50)
Bus A (35 mins, £7)
Transfer Details – The group transfer will leave Union Station at 16:00. We recommend not landing later than 14:00 to give yourself time to pass through passport control and baggage reclaim.
Journey time is around 30 minutes from Denver to Boulder. The return to Union Station will be at 10:00 on the final day arriving around 10:30. We recommend not booking your return flight before 14:00.
Max Group Size – 12
Difficulty – On all our Trailmates trips you should have a good level of fitness. You don’t need to be an expert hiker but walks can be long with elevation. When possible we try to offer alternative options for those who want an easier day.
Dates & prices
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Early Bird DiscountSaturdayJune 12, 2027SaturdayJune 19, 2027$3,451$3,10510% OffAvailable
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Early Bird DiscountSaturdaySeptember 11, 2027SaturdaySeptember 18, 2027$3,451$3,10510% OffAvailable
EXCELLENT Based on 79 reviews Posted on Google TH WWTrustindex verifies that the original source of the review is Google. Well-designed and varied itinerary. We joined the first Sardinia tour with Garry, who accompanied the group throughout—clear attention to detail and strong collaboration with the local guide, Sergioooooooooooo. (Must pronounce his name in this way) The guide was knowledgeable and attentive, offering detailed insights during hikes while making sure everyone was comfortable. Accommodation was consistently good, and the traditional mountain shepherd dinner was a standout. I joined with a high school friend who flew across the Atlantic—worth it. The group bonded quickly despite different backgrounds. A strong choice if you want a hiking-focused trip with like-minded people.Posted on Google Chiao ChangTrustindex verifies that the original source of the review is Google. I joined a hiking trip with Trailmates Adventures for Sadinia trip and had a great experience. The trip was well-organized, and the guides were knowledgeable, friendly, and made everyone feel comfortable throughout the hike. The scenery was beautiful, and everything ran smoothly from start to finish. I’d definitely join another trip with them in the future and highly recommend them to anyone who enjoys outdoor adventures.Posted on Google Erika HoszuTrustindex verifies that the original source of the review is Google. I had such an amazing experience on this Sardinia trip with Trailmates Adventures. Everything was so well organized, from the activities to the overall vibe of the group—it really made the whole holiday feel effortless and enjoyable. Garry was a fantastic host throughout the trip. He created a really welcoming and relaxed atmosphere, making it easy for everyone to connect and feel included. You can tell he genuinely cares about giving people a great experience, and it shows in all the little details. Sardinia itself was absolutely beautiful, and the mix of adventure, social time, and exploring made it the perfect balance. I came back not only with great memories but also having met some wonderful people. I would definitely recommend this trip to anyone looking for a fun, well-organized group holiday—and I’d happily join another one in the future!Posted on Google Bel BerryTrustindex verifies that the original source of the review is Google. Absolutely loved my first trip to Morocco through Trailmates Adventures. I’ve looked into other solo traveller group tours before but none ever ticked all the boxes until now. The entire trip felt like a hiking holiday with like minded friends - fun and interesting. Some friendships will last a long time, and some just shared moments. Great itinerary, well planned out, and adaptable depending on fitness levels. Communication was really good and straightforward, from both the organisers and the trustworthy local guides. Overall it was an incredible experience that exceeded expectations, and I am looking forward to booking my next trip. If you feel hesitant of travelling/hiking solo then Trailmates is for you!Posted on Google Anastasiia VlasovaTrustindex verifies that the original source of the review is Google. Our trip to Madeira was amazing. Trailmates Group organized a wonderful hike. This was our first group tour and our first hike ever, and now we'll definitely be going on more with this company. Firstly, the price was reasonable and the quality matched our expectations. Secondly, the tour was the perfect difficulty level and suitable for travelers of all fitness levels. The idea of traveling just for the hike was the most important thing for us, as we wanted to fully enjoy the hiking and nature. I'd also like to point out that Harry was always available, which gave us a sense of security. A huge thank you to our guide, Paolo – he's very friendly, has a clear itinerary, and does his job 100%. The other members of our group are wonderful, engaging people. We're so glad we met them, and they'll remain etched in our memories. Thank you, Trailmates, for Madeira, and we'll see you soon!Posted on Google Agnieszka JaTrustindex verifies that the original source of the review is Google. I cannot recommend Trailmates Adventures enough! From my very first inquiry, Garry was professional, knowledgeable, and incredibly quick to respond to all my questions. It was truly a trip of a lifetime, and will definitely be booking my next holiday with themPosted on Google Orlagh WalkerTrustindex verifies that the original source of the review is Google. Ive just had the most amazing week with Trail mates adventures.Its my first time doing a solo trip and it was so smooth from start to finish. Garry was just amazing and answered all my questions promptly and with care. The hikes were first class and our hike leader Paolo was a gem. I loved the group and my roommate was so lovely. What an amazing experience. I will definitely go again with this company.Posted on Google SV3 LeerTrustindex verifies that the original source of the review is Google. My trip to Marokko was great. I liked the hikes in the Atlas Mountains and my fellow travellers in the group were great, too. I highly recommend it. :)Posted on Google Natasja HoexTrustindex verifies that the original source of the review is Google. Atlas hike Marokko Ik heb een hele leuke week in de Atlas in Marokko gehad met trailmates. Ik vond de hikes heel divers. Het hotel was fijn en de groep was echt super. Het is tof dat je in een internationale groep reist. Dat maakt de gesprekken extra interessant vind ik. Wat ik ook echt een plus vind, is dat je vertrekt vanuit dezelfde plek. Dus mocht je een keer niet mee willen/ kunnen dan is dat geen probleem. Plus je komt in een soort “thuis” terug. Ik ga zeker nog eens met deze organisatie op pad :-)Verified by TrustindexTrustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more
