From high-altitude climbing at Arapahoe Basin to tranquil mornings on Lake Dillon and sky-high gondola rides, summer in Keystone, Colorado is an invitation to explore, breathe deeply, and feel alive.
Nestled in the heart of the Rockies, Keystone may be best known for its winter slopes. But when the snow melts, a new kind of magic takes over: trails wind through pine-scented forests, alpine lakes shimmer under the sun, and rugged peaks rise into brilliant blue skies. It's Colorado at its most alive, filled with energy, color, and endless ways to explore.
If you're craving a summer filled with adventure and just enough chill time, Keystone's got you. Here are nine of our favorite ways to soak it up:
Quick Look: Top Keystone Summer Adventures
- Scale the Via Ferrata at Arapahoe Basin.
- Ride 55 miles of lift-access trails at Keystone Bike Park.
- Paddle, sail or just float on Lake Dillon.
- Hike the high-altitude Grizzly Peak Trail.
- Ease into it on the Peru Creek Trail and explore mining history.
- Glide above the mountains on the River Run Gondola.
- Test your limits at an aerial adventure park.
- Get our summer essentials for your visit.
- Learn how to enjoy it responsibly (because nature still calls the shots).
At Great Western Lodging, we specialize in premium, boutique-style vacation rentals, taking pride in creating a true mountain escape where comfort meets adventure.
As locals, we know Breckenridge, Frisco, and Keystone like the back of our hands, and our blog is packed with insider tips for your next mountain getaway. Visiting our region for the first time? Planning a ski trip? Into summer mountain thrills? We've got you covered!
Today, we'll bring you the best ways to experience Keystone in summer. Let's jump in!
1. Conquer the Via Ferrata at Arapahoe Basin
If you've ever thought, "I'd love to climb a cliff ... but safely," this is your moment. The Via Ferrata (Italian for "iron way") at Arapahoe Basin invites you up steel rungs, ladders and cables — 800 feet up granite, above 13,000 feet elevation. It's bold, it's wild, and it's easier to get to than you might think.
Located just 6 miles (about a 10-minute drive) from Keystone, you'll get there either by car or the free Summit Stage bus. It's a chance to leave comfort zones behind and reward yourself with views that take your breath away.
What You'll Love
- One of the highest guided climbs in North America.
- A mix of challenge and major "wow" factor.
- Expert guides who'll walk you through the steps.
- Epic panoramic views once you reach the top.
What People Say
"The challenge is intimidating, but often, people discover stamina and abilities they didn't know they had. Mountains seem to have this effect on people!"
2. Ride the Trails at Keystone Bike Park
Two wheels, big trails, and mountain air: that's the vibe at Keystone Bike Park. With 55 miles of lift-accessed trails and 28 different routes, you'll find everything from smooth beginner rides to expert-level descents (yep — including a 14-foot corkscrew on the Sanitarium trail).
The trails start right in River Run Village, so you're basically minutes from adrenaline and views. Whether you're a pro or you just want to try something new, this place delivers.
What You'll Love
- A huge trail network for all experience levels.
- Forest paths, alpine meadows and "ridethrough" scenery.
- Full services: rentals, repairs, rest stations.
- Unforgettable backdrop: Lake Dillon, Ten Mile Range, you name it.
What Riders Say
"The terrain is absolutely breathtaking, with stunning views of the Ten Mile Range, Breckenridge, and Lake Dillon. Every descent feels like an adventure through pine-scented air and wild-flower meadows."
3. Paddle and Sail on Lake Dillon
Just 7 miles from Keystone (about 13 minutes' drive via Highway 6), Lake Dillon is your mountain-lake playground. This 3,300-acre reservoir at 9,017 feet elevation offers paddling, sailing, or simply drifting and enjoying the silence.
Stop by Dillon Marina for kayaks, stand-up paddleboards (SUP), or sail lessons (yes, certified instructors!) — perfect for every skill level. Especially early in the morning, when the water is glassy and the air is cool.
What You'll Love
- Calm waters perfect for paddling with a mountain backdrop.
- Sailing lessons that feel both nourishing and fun.
- Easy access — close enough to make it spontaneous.
- Quiet coves and beautiful sunrise conditions.
What People Say
"My family took sailing lessons — wonderful experience! The instructor was extremely knowledgeable and patient."
"The water was like glass in the early morning. We were paddling toward islands I'd seen hundreds of times from the freeway."
4. Hike the Grizzly Peak Trail
If you're up for a "yes, we can" kind of hike, the Grizzly Peak Trail delivers. Starting at Loveland Pass (a quick 20-minute drive from Keystone), this 6.5-mile round-trip hike ascends roughly 3,000 feet to a summit of 13,427 feet. It's steep. It's challenging. But the payoff? Absolutely worth it.
Wildflowers, alpine ridgelines, and endless mountain vistas make every step count. And by the time you reach the top, you'll know you earned that view.
What You'll Love
- 360-degree views that feel rewardingly high.
- A summit that tells you you've done something.
- Alpine terrain that's as beautiful as it is bold.
- A sense of achievement you'll remember.
What People Say
"The terrain is absolutely breathtaking — snow-capped peaks, alpine flowers, and silence so pure you can hear your heartbeat. Challenging but so worth it."
5. Step Back in Time on the Peru Creek Trail
Want something a little gentler? The Peru Creek Trail is a great choice. Just 4.6 miles from Keystone via Montezuma Road, this 6-mile out-and-back trail winds beside the creek, through forest, past historic mining remnants — perfect for families, friends, or anyone who wants to take their time and soak in scenery.
What You'll Love
- Accessibly beautiful terrain for all ages.
- Historic mining sites that add a story to your walk.
- Forests, creek-side peace, and mountain views.
- Just minutes away from your base in Keystone.
What People Say
"The trail offers beautiful scenery and fascinating glimpses into the region's mining past. It's an easy hike with a lot to see along the way."
6. Glide Above It All on the River Run Gondola
Sometimes the best view comes when you're not even walking. The River Run Gondola takes you from River Run Village (9,280 ft) to the summit of Dercum Mountain (11,640 ft) in just 11 minutes — and yes, that entire ride is pretty spectacular.
Once you're at the top, you're free to explore short alpine hikes, grab a meal, or just lean on the rail and take it all in. Because sometimes adventure means catching your breath and appreciating the view.
What You'll Love
- A smooth, scenic ride to the summit.
- A view that makes you feel part of the mountains — not just a visitor.
- Top-of-the-world perspective thanks to 360° vistas.
- Summer access + activities at the summit make it more than just a ride.
What People Say
"The views get better and better as you go — a must-do in Keystone! The climb becomes even more exciting as you reach higher altitudes."
7. Test Your Limits at the Aerial Adventure Park
For that heart-pounding moment when you say, "Why not?" the aerial park in Idaho Springs (about 45 minutes from Keystone) is your playground. With over 60 obstacles across Copper (easy), Silver (intermediate), and Gold (advanced) levels, you pick where you want to play — and how far you're willing to push.
Guides help you clip in, gear up, and get through the course safely. Two to three hours later? You'll be counting which part you were most proud of.
What You'll Love
- 60+ treetop challenges — swing, climb, balance, repeat.
- Difficulty levels that match your mood and ambition.
- Expert guides who make fear fun and safe.
- That spark of accomplishment when you finish.
What People Say
"Each course has a fantastic variety of challenges that make the experience unforgettable. The safety measures and guides are top-notch — we felt secure the entire time."
8. Plan Your Visit: Keystone Summer Essentials
Let's talk nitty-gritty so your trip goes smoother:
- Best Months: July & August
- Season Duration: Late June through Labor Day
- Temperature Range: 65°F–86°F (average high around 75°F / 24°C)
- Heads-Up: Afternoon thunderstorms pop up often — pack layers, a light rain jacket, and expect changes.
- Sunshine: Around 245 sunny days each year — pretty solid odds.
9. Adventure Responsibly
Sure, excitement is the idea. But mountains? They demand respect. Here's how to keep it fun and safe:
What You'll Love (and Need to Remember)
- Match your activity to your experience — don't pressure your pace.
- Listen to guides, use proper gear, follow the rules.
- Check weather and trail conditions before you head out.
- Drink water, wear sunscreen, dress in layers.
- Go with a friend or join a guided group — adventure is better shared.
Quick FAQ: Summer Activities in Keystone
What are the best summer activities in Keystone, CO?
Top picks include climbing the Via Ferrata at Arapahoe Basin, mountain biking at Keystone Bike Park, hiking Grizzly Peak, paddling on Lake Dillon, and riding the River Run Gondola for incredible views.
What are the best summer activities in Keystone for couples?
Couples love scenic gondola rides at sunset, stand-up paddleboarding on Lake Dillon, and dining with mountain views at the summit of Dercum Mountain. A guided hike or sailing lesson also makes for a memorable date.
Are there kid-friendly things to do near Keystone in summer?
Yes! Families can enjoy easy hikes like the Peru Creek Trail, lift rides on the River Run Gondola, or bike paths around Dillon Reservoir. The Aerial Adventure Park and summer festivals nearby are always a hit with kids.
What can I do in Keystone, CO besides ski?
When the snow melts, Keystone transforms into a summer playground with hiking, biking, fishing, kayaking, and festivals. You can explore nearby Frisco and Dillon for live music, local markets, and lakeside dining.
Can beginners try the Via Ferrata?
Yes — the experience is fully guided with professional equipment and training. It's perfect for adventurous first-timers looking for a safe challenge.
When is the best time to visit Keystone in summer?
Late June through early September is ideal, with July and August offering the warmest, sunniest weather for outdoor adventures.
Is the River Run Gondola open in summer?
Absolutely. It operates year-round and offers stunning 360° views of the Ten Mile Range, Lake Dillon, and the Continental Divide.
Where should I stay for a Keystone summer getaway?
For comfort and convenience, Great Western Lodging offers premium vacation rentals in Keystone, Breckenridge, and Frisco — ideal for couples, families, or friends looking to unwind after days packed with mountain fun.
Where to Stay During Your Visit to Breckenridge, Frisco, and Keystone
At Great Western Lodging, we offer a superior selection of luxury properties, ski-in/ski-out options, and downtown lodgings in Breckenridge, Frisco, and Keystone.
Staying in one of our properties, we guarantee you'll have nothing less than a 5-star experience during your trip to Colorado.