South Boulder Peak

What Is the Highest Peak in Boulder, Colorado?

Ask ten people in Boulder what the highest peak is, and most will get it wrong.

Some will say Longs Peak. Others will guess Bear Peak.

The real answer is South Boulder Peak, which rises to 8,549 feet.

It is widely recognized as the highest summit within Boulder’s Open Space and Mountain Parks system, making it the highest peak associated with the city of Boulder itself.

Why Longs Peak Doesn’t Count

There’s a good reason for the confusion.

Longs Peak stands at an impressive 14,259 feet, making it the highest point in Boulder County. But it’s located deep inside Rocky Mountain National Park, well outside Boulder city limits and more than an hour away.

It may dominate the skyline on a clear day, but it’s not actually in Boulder.

Boulder’s Favorite Winter Peak: Longs

South Boulder Peak vs. Bear Peak

Right next to South Boulder Peak sits Bear Peak, which reaches 8,461 feet.

That makes it slightly lower, even though it often gets more attention due to its prominent shape and visibility from town.

For hikers chasing the true high point of Boulder, South Boulder Peak takes the crown.

The Boulder Skyline Traverse

For experienced hikers, South Boulder Peak is part of one of Colorado’s most iconic routes: the Boulder Skyline Traverse.

This challenging adventure typically includes five major peaks, though exact routes can vary:

• South Boulder Peak – 8,549 ft
• Bear Peak – 8,461 ft
• Green Mountain – 8,148 ft
• Flagstaff Mountain – ~6,983 ft
• Mount Sanitas – ~6,863 ft

The full traverse covers about 17 miles with roughly 5,900 feet of elevation gain.

Most hikers take 11 to 13 hours to complete it.

The reward is nonstop panoramic views of Boulder, the Flatirons, and the plains stretching far to the east.

AboutBoulder columnist Brenna Bray, PhD scrambles atop Bear Peak while traversing the “Boulder Skyline” “out-and-back”

Hiking South Boulder Peak

South Boulder Peak delivers one of the most rewarding hikes in the Boulder area.

Distance: ~8.3 miles round trip
Elevation Gain: ~3,000 feet
Difficulty: Hard

The most popular route starts at the South Mesa Trailhead. From there, hikers follow the Mesa Trail before turning up Shadow Canyon.

The final stretch involves steep terrain and light Class 2 scrambling over loose rock near the summit.

The scenery changes dramatically along the way, moving from grassy foothills to forested sections and eventually open, rocky terrain near the top.

Tips for a Safe and Successful Hike

• Start early to avoid afternoon thunderstorms common in Colorado
• Bring at least 3 liters of water per person
• Wear sturdy hiking shoes with strong traction
• Use trekking poles for the steep descent
• Check current conditions through City of Boulder Open Space and Mountain Parks
• Dogs are allowed in many areas but must follow Boulder’s voice-and-sight or leash regulations depending on the zone

Why South Boulder Peak Is Worth It

While Green Mountain often draws larger crowds and Bear Peak gets more attention, South Boulder Peak offers something different.

It feels more remote.

It’s slightly higher.

And it gives hikers the satisfaction of reaching the true high point of Boulder’s mountain landscape.

From the summit, you get sweeping 360-degree views with fewer people and a deeper sense of accomplishment.

Final Thoughts

Boulder is surrounded by incredible mountains, but when it comes to the highest peak tied directly to the city, South Boulder Peak stands above the rest.

Whether you’re training for bigger Colorado climbs or simply looking for a challenging and scenic hike, this peak delivers.

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