First Flatiron: Boulder's Iconic Hike

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Hike to Boulder's iconic sandstone formation for breathtaking views and a memorable outdoor experience in the heart of the Rocky Mountains.

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First Flatiron

The First Flatiron, a towering sandstone formation near Boulder, Colorado, offers a popular and rewarding hiking experience with stunning views. Its distinctive shape and accessibility make it a must-see landmark for visitors and locals alike.

A brief summary to First Flatiron

Boulder, Colorado, 80302, US
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Monday 5 am-11 pm
Tuesday 5 am-11 pm
Wednesday 5 am-11 pm
Thursday 5 am-11 pm
Friday 5 am-11 pm
Saturday 5 am-11 pm
Sunday 5 am-11 pm

Local tips

Arrive early, especially on weekends, as parking at Chautauqua Park fills up quickly.
Bring water and sun protection, as the trail can be exposed.
Wear hiking shoes with good traction, especially if hiking during winter months when the trail can be icy.
Stay on marked trails to avoid erosion and protect the delicate ecosystem.
Consider taking the free Park-to-Park shuttle during summer weekends to avoid parking hassles.

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Getting There

Walking

From Chautauqua Park, head towards the Ranger Cottage and follow the Chautauqua Trail. At the second major junction, connect with Flatirons Loop Trail, and then take a right onto the 1st/2nd Flatiron Trail. The trail becomes steeper and rockier as you ascend. Parking at Chautauqua Park costs $2.50 per hour from 8 am to 5 pm on summer weekends and holidays. You can pay at the pay stations or via the ParkMobile app.
Public Transport

From downtown Boulder Station, take the bus route 204/ towards Broadway & Euclid Ave. From there, it's a short walk west to Chautauqua Park and the trailhead. The bus fare is $3. Alternatively, during summer weekends and holidays, take the free Park-to-Park shuttle from various locations in Boulder to Chautauqua Park. Check the City of Boulder website or Transit app for the shuttle schedule.
Taxi/Ride-Share

From downtown Boulder, a taxi or ride-share to Chautauqua Park will take approximately 5 minutes and cost between $8 and $11. Be aware that during peak season, ride-share availability may be limited, and surge pricing could apply.

Discover more about First Flatiron

The First Flatiron is the northernmost and most easily accessible of the five numbered Flatirons, massive, slanted sandstone formations that define Boulder's skyline. These geological wonders, composed of 290-296 million-year-old conglomeratic sandstone, were tilted into their present orientation during the Laramide Orogeny, a mountain-building event that occurred between 80 and 35 million years ago. The hike to the saddle between the First Flatiron and Sunset Rock is a popular trek, offering panoramic views of Boulder and the surrounding plains. The trail, starting from Chautauqua Park, winds through meadows and up rocky switchbacks, with some light rock scrambling required near the top. The summit provides views of Longs Peak and the Indian Peaks Wilderness. While the hike is generally considered moderate to difficult, its proximity to downtown Boulder and the University of Colorado makes it a heavily trafficked trail. The Flatirons have been a symbol of Boulder for decades, with the third Flatiron once bearing the letters "CU" for the University of Colorado. Though the letters have since been painted over, the Flatirons remain an enduring emblem of the city.