A Day Trip to Boulder

Boulder sits where the plains run straight into the foothills, under the tilted sandstone slabs known as the Flatirons. The city has protected a ring of open space around itself for decades, so the hiking starts at the end of residential streets. Add a pedestrian downtown, a creek path through the middle of town and a university campus of red-tile roofs, and you have one of the most rewarding short trips from Denver.

Getting to Boulder

By bus

RTD's Flatiron Flyer is the simplest car-free option. The buses run on US-36 between Denver Union Station and downtown Boulder, with frequent departures for most of the day. From the Boulder end, downtown and Pearl Street are a short walk. Check RTD's trip planner for the current timetable and fares before you go.

By car

US-36, the old Denver–Boulder Turnpike, gets you there in about 35 to 50 minutes depending on traffic. As you crest Davidson Mesa near Louisville, the whole Boulder valley opens up below the Flatirons, one of the classic views of the Front Range. Downtown Boulder has public parking garages within a few blocks of Pearl Street.

Getting to the trails

In summer 2026, the City of Boulder ran a free Park-to-Park shuttle on weekends and holidays from Saturday, May 23 through Monday, September 7, every 30 minutes from 8 a.m. to 8 p.m. Pickups included downtown city garages and satellite lots. On those days parking at Chautauqua and the streets around it was paid. Outside that program, the city says there is no shuttle and parking at Chautauqua is free. Program details change each year, so check the city's shuttle page first.

Chautauqua Park and the Flatirons

Chautauqua is the front door to Boulder's mountain parks. The historic grounds date to 1898, when the city and Texas educators created a summer retreat for lectures and music. The cottages, the dining hall and the wooden auditorium are still in use, and the auditorium hosts summer concerts. Above them, a sloping meadow climbs toward the Flatirons, and several trails branch from the Ranger Cottage at the top of the parking area.

• EasyWalk the meadow paths for close views of the First and Second Flatirons without a steep climb.
• ModerateThe Royal Arch trail climbs steadily through the forest to a natural rock arch with views over the city.
• SteeperThe Flatirons loop trails gain elevation quickly beneath the rock faces. Expect rough, rocky footing.
• ClimbersThe Flatirons are famous technical climbs. Seasonal closures protect nesting raptors on some formations.

Pearl Street Mall

Four blocks of Pearl Street have been closed to cars since the late 1970s, and the brick promenade is the social center of town. Expect independent bookstores, outdoor gear shops, restaurants with patios, flower beds tended through the season and street performers on warm evenings. The blocks just off the mall, both east and west, hold many of the city's better restaurants and are often quieter. A few blocks south, the ornately painted Boulder Dushanbe Teahouse was a gift from Boulder's sister city in Tajikistan and is worth seeing even if you are not stopping for tea.

Boulder Creek Path

A paved, car-free path follows Boulder Creek through town, passing parks, the library and the university's edge before heading up the mouth of Boulder Canyon. It is ideal for a flat walk after a morning hike or for a rented bike. In late spring the creek runs high with snowmelt and the path gets busy with tubers once flows drop in summer.

More to do in and around Boulder

Flagstaff Mountain

A steep road climbs from the west end of Baseline Road up Flagstaff Mountain to overlooks, picnic areas and trailheads. The views over the city are excellent at sunset. Parking at some Flagstaff areas has required a permit for non-county vehicles, so read the signs.

The university campus

The University of Colorado Boulder campus is known for its sandstone buildings with red tile roofs in a style sometimes called Tuscan vernacular. A walk through the main quad is pleasant and free. The campus museums and planetarium have posted public hours; check them before visiting.

NCAR Mesa Laboratory

On a mesa at the south edge of town, the National Center for Atmospheric Research's Mesa Laboratory is a striking concrete building by architect I. M. Pei, with public exhibits on weather and climate when the visitor center is open. The setting under the Flatirons is spectacular, and a short trail loops from the parking lot.

Eldorado Canyon State Park

Southwest of Boulder, Eldorado Canyon is a narrow, sheer-walled canyon famous with rock climbers and lovely for hikers too. It is a Colorado state park, so a park pass is required, and the small parking areas fill on weekends. Arrive early or visit on a weekday.

A sample Boulder day

Practical notes

• Dogs: Boulder's open space has specific leash and voice-and-sight rules. Read trailhead signs and keep dogs leashed if you are not enrolled in the city's program.
• Water and sun: Boulder sits at about 5,400 feet. Carry more water than you think you need and use sunscreen even on cool days.
• Weekends: Trailhead lots fill early from spring through fall. A weekday visit is noticeably calmer.
• Wildlife: Black bears and mountain lions live in the foothills above town. Keep food secured in cars and stay alert at dawn and dusk.

Boulder also makes a stepping stone to Rocky Mountain National Park: US-36 continues north through Lyons to Estes Park in about an hour.

Frequently asked questions

Checked against official sources in October 2026. Hours, fees, reservation rules and road status change often; the agency or venue linked above is always the final word. See how we research.