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Green Boulder

A Destination for Eco-Conscious Travelers

If traveling sustainably is important to you, then Boulder should most definitely be on your (100% recycled) must-visit list. When you come to Boulder, you’ll be traveling to a place that has been a leader in environmentalism for decades and continues to make green living a priority. Here are just a few ways the city has united to conserve land and resources.

Drawing the "Blue Line"

In its early years, Boulder's mountain backdrop was threatened by proposed developments. So in 1959, Boulder citizens spoke out and created a charter amendment to prohibit water service above a stated contour of elevation, known as the "Blue Line." The definition of the "Blue Line" is the line above which the City of Boulder will not supply water for domestic, commercial or industrial uses.

See Green, Be Green: Today, as you look to Boulder's mountain horizon, you can see where development stops and a natural landscape remains.

Beyond the Blue Line are Boulder's foothills and forests

45,000 Acres of Open Space

As early as 1898, Boulder residents began purchasing land with the purpose of protecting Boulder's natural beauty. In 1967, Boulder became the first city in the U.S. to tax itself for the acquisition, management and maintenance of open space. Today, there are 45,000 acres of this open space in and around the city that's managed by the City of Boulder Open Space and Mountain Parks, giving residents and visitors instant access to forests, mountains, plains and wetlands for nature walks, hiking, biking, rock climbing and simply clearing your head. 

See Green, Be Green: Help protect these pretty and precious acres. Remember to stay on the trail, even when it’s muddy. Stepping off the trail creates erosion and widens the trail into natural habitat.

Preserving the Views, Too

In 1971, another effort was made to protect the view of Boulder's precious foothill mountains. A charter amendment was created that limited the height of new buildings to 55 feet. Since then, the amendment has been modified and building heights are capped at 35 feet in most of Boulder and property owners can ask for modifications for up to 55 feet.

Boulder's building-height restrictions are designed to preserve views

An International Climate Leader

Boulder County has been recognized by CDP, a global environmental reporting organization, for its bold leadership on environmental action and transparency. Boulder County made the “Cities A List,” earning the CDP's highest rating alongside 95 cities around the world. Only 9.8% of cities and counties that were scored in 2021 received an A.

Zero Waste Efforts Everywhere You Look

As you walk around town and come across a waste bin, you'll notice there's actually a trio of waste bins in most places. That’s because the city’s Universal Zero Waste Ordinance requires properties in Boulder to have separated compost, recycling and trash service. While the three-bin system can give newcomers pause at first, just taking an extra second or two to sort your waste can help us collectively keep tons of waste out of landfills.

See Green, Be Green: City-permitted events and festivals are also required to be zero-waste, so come enjoy a local festival knowing it's greener.

Along Pearl Street and elsewhere are compost and recycling bins

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Go Behind the Scenes

Boulder's award-winning recycling center is a marvel of innovation, and you can actually take a self-guided tour (or a guided tour for 10 more people). Learn more about tours here.

Getting Hikers to Trails More Sustainably

Through pioneering partnerships and programs, five land-management agencies provide Boulder County residents and visitors with four hiker shuttles. They provide car-free access to some of the most popular trailheads in Colorado — Chautauqua, Eldorado Canyon State Park, Indian Peaks Wilderness Area and Rocky Mountain National Park. Riders can enjoy a convenient, low-stress way to access some of the most beautiful (and popular) city, state and federal public lands near Boulder while reducing congestion and limiting car emissions.

Pro Tip: If you take the summer weekend bus to Rocky Mountain National Park, you can skip the step of making a timed reservation. Learn more.

Hikers and their pup ride the Park to Park shuttle to Chautauqua

Car Chargers Galore

Traveling in a plug-in electric vehicle? You’ll be pleased to know there are 48 electric-vehicle charging stations all over Boulder — from the parking lot right at the foot of the Flatirons to downtown city-run parking garages. The city also aims to electrify its entire fleet by 2030.

Making Two-Wheeled Transportation Safer and Easier

In and around Boulder are more than 300 miles of bikeway. You could say we are a bike-obsessed town. Boulder has 96 miles of bike lanes, 84 miles of multi-use paths, 50 miles of designated bike routes. After a snowfall, the bike paths often get cleared before the streets do! 

See Green, Be Green: If you’d like to bike around town, we have e-bike rentals, public bike kiosks and bike shops with bike rentals galore.

Biking the Boulder Creek Path in winter

Fervidly Reducing Carbon Emissions

In the Boulder Climate Action Plan, the city has set out to reduce carbon emissions by 70 percent by 2030, hit net-zero emission by 2035 and become carbon-positive by 2040. Boulder made national news and history in 2006 when introducing a “carbon tax” on the use of electricity generated from fossil fuels, the first of its kind in the United States. The carbon tax generates about $1.8 million each year, and these funds go toward implementing the Boulder Climate Action Plan.

See Green, Be Green: Flying into Denver International Airport? You can ride a bus from DEN to downtown Boulder by hopping on the AB/AB1 route, operated by RTD. Boulder's super walkable, or you can rent a car once you're here.

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See Green, Be Green

Flying into Denver International Airport? You can ride a bus from DEN to downtown Boulder by hopping on the AB/AB1 route, operated by RTD. Boulder's super walkable, or you can rent a car once you're here.

Turning Poop to Potting Soil

Boulder offers a dog-waste composting program at many popular trailheads, saving approximately 25 to 30 tons of dog waste from entering landfills and turning the waste into a beneficial compost mixture. 

See Green, Be Green: If you're traveling with your doggo, you can help us keep our trails and parks poop-free as required by law. 

Cutting Edge of Climate Science

Often when you hear about climate science research in the news, you’ll notice it was conducted by scientists in Boulder. The city leads the charge when it comes to weather and climate expertise, with the top national labs and institutes based here. In 1965, the first scientific conference on the causes of climate change took place in Boulder, and the University of Colorado Boulder is partnering with United Nations Human Rights to co-host the Right Here, Right Now Global Climate Summit.

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Learn and Grow

The Conference on World Affairs, held every April at the University of Colorado, brings in experts from all over the world for four days of panels, keynotes and events. There are always lively sessions on climate to attend — and it's all free!

Big-Hearted Businesses 

Boulder has the highest per-capita concentration of B Corps in the nation. Those are companies where environmental conservation and social responsibility are equally as important as revenues. This includes organizations like Namaste Solar, Bhakti Chai and Conscious Coffees. The city is also home to many environmental-focused organizations and companies, such as Eco-Products, Environmental Defense Fund, Access Fund, Leave No Trace Center for Outdoor Ethics, EcoVessel and more.

See Green, Be Green: Shop green at places, like Momentum (gorgeous, fair-trade goods), Nude Foods Market (organic foods and household products in zero-waste, reusable containers), Art Parts Creative Reuse Center (second-hand art supplies and found objects) or a huge number of Boulder thrift stores.

Public Transportation Made Fun and Easy

Boulder's convenient HOP shuttle makes a loop through Boulder's fairly compact geography, hitting downtown, Twenty Ninth Street, the University of Colorado, and the Hill along the way. The frequency is 12-20 minutes and the fare is just $3 (fare serves as a 3-hour pass). It's a great way to get around to all the major sights in Boulder. More options within Boulder include the SKIP, which runs north and south along Broadway, and the BOUND, which travels up and down 30th St.

Photo by Gwen Gray

A weather projection at the National Oceanic and Atmospheric Administration

Free Water and Energy Conservation Services

Boulder County’s Partners for a Clean Environment (PACE) program provides commercial and residential customers with free water and energy services. Their programs have led to more than 3.7 megawatts of solar installations on homes and businesses, reduced an estimated 36,000 metric tons of CO2e annually (the equivalent of taking 7,620 cars off the road), and saved an estimated 42 million gallons of water annually.

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Keep Wildlife Wild

Colorado is home to tens of thousands of furry, scaly and feathered creatures. To keep them — and you — safe, don’t approach or feed them.

Energy Conservation in New Builds

The City of Boulder Energy Conservation Code is our city's version of the 2018 International Energy Conservation Code — except it is 20 percent more efficient than the national code. It prescribes minimum energy efficiency and conservation standards for new buildings and for additions and alterations to existing buildings in an effort to help our city meet broader climate commitment goals.