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4 cleaner spots within a 3-hour drive

Boulder is breathing 2.0 cigarettes a week

6.2
PM2.5 µg/m³
34
AQI
0.2
Cleanest in reach · µg/m³
See the 4 cleaner spots

Where are you?

Search covers Canada and the United States.

The better move within a 3-hour drive

Dates

Dates follow you into hotel searches. Live inventory is confirmed by the provider.

Estes Park looks like the better move.58% cleaner air with a verified 1 h road trip. Rankings balance cleaner air with trip ease.

Every town is also available in the ranked list.
Boulder Clean · PM2.5 0–5 Good · 5–9 Elevated · 9–15 Polluted · 15–35 Unhealthy · 35–55 Severe · 55+
Top pick
Winter Park
Cel-shaded illustration of Winter Park
#1Winter ParkPM2.5 1.6Checking road routesaves 1.5 cigs/wk

Colorado· PM2.5 1.6 µg/m³

Ski town over Berthoud Pass near 9,000 feet, with thin alpine air and a large base of condos and lodges.

74% cleaner than home — pack the car.

PM2.5 is 1.6 µg/m³ here vs 6.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 1.6/22 × 7 = 0.5 here; 6.2/22 × 7 = 2.0 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

4.6 µg/m³ less fine-particle pollution than Boulder right now

74% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 27, 8:27 p.m. EDT

PM2.5 is modelled for this town — no monitoring station is close enough for a live AQHI.

HotelsRentalsDirections
Granby
Cel-shaded illustration of Granby
#2GranbyPM2.5 1.6Checking road routesaves 1.5 cigs/wk

Colorado· PM2.5 1.6 µg/m³

Middle Park ranching town near Lake Granby and Rocky Mountain National Park, with open-water mountain air.

74% cleaner than home — pack the car.

PM2.5 is 1.6 µg/m³ here vs 6.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 1.6/22 × 7 = 0.5 here; 6.2/22 × 7 = 2.0 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

4.6 µg/m³ less fine-particle pollution than Boulder right now

74% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 27, 8:27 p.m. EDT

PM2.5 is modelled for this town — no monitoring station is close enough for a live AQHI.

HotelsRentalsDirections
Leadville
Cel-shaded illustration of Leadville
#3LeadvillePM2.5 1.6Checking road routesaves 1.5 cigs/wk

Colorado· PM2.5 1.6 µg/m³

North America's highest incorporated city at 10,150 feet, with thin alpine air and historic hotels.

74% cleaner than home — pack the car.

PM2.5 is 1.6 µg/m³ here vs 6.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 1.6/22 × 7 = 0.5 here; 6.2/22 × 7 = 2.0 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

4.6 µg/m³ less fine-particle pollution than Boulder right now

74% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 27, 8:27 p.m. EDT

PM2.5 is modelled for this town — no monitoring station is close enough for a live AQHI.

HotelsRentalsDirections
Dillon
Cel-shaded illustration of Dillon
#4DillonPM2.5 1.9Checking road routesaves 1.4 cigs/wk

Colorado· PM2.5 1.9 µg/m³

Reservoir town in Summit County near 9,100 feet, ringed by peaks with open-water air and resorts.

69% cleaner than home — pack the car.

PM2.5 is 1.9 µg/m³ here vs 6.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 1.9/22 × 7 = 0.6 here; 6.2/22 × 7 = 2.0 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

4.3 µg/m³ less fine-particle pollution than Boulder right now

69% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 27, 8:27 p.m. EDT

PM2.5 is modelled for this town — no monitoring station is close enough for a live AQHI.

HotelsRentalsDirections
Silverthorne
Cel-shaded illustration of Silverthorne
#5SilverthornePM2.5 1.9Checking road routesaves 1.4 cigs/wk

Colorado· PM2.5 1.9 µg/m³

Summit County outlet town near Lake Dillon, a high-elevation base with condos and mountain air.

69% cleaner than home — pack the car.

PM2.5 is 1.9 µg/m³ here vs 6.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 1.9/22 × 7 = 0.6 here; 6.2/22 × 7 = 2.0 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

4.3 µg/m³ less fine-particle pollution than Boulder right now

69% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 27, 8:27 p.m. EDT

PM2.5 is modelled for this town — no monitoring station is close enough for a live AQHI.

HotelsRentalsDirections
Frisco
Cel-shaded illustration of Frisco
#6FriscoPM2.5 1.9Checking road routesaves 1.4 cigs/wk

Colorado· PM2.5 1.9 µg/m³

Summit County lake town near 9,100 feet on Lake Dillon, with open-water mountain air and abundant lodging.

69% cleaner than home — pack the car.

PM2.5 is 1.9 µg/m³ here vs 6.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 1.9/22 × 7 = 0.6 here; 6.2/22 × 7 = 2.0 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

4.3 µg/m³ less fine-particle pollution than Boulder right now

69% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 27, 8:27 p.m. EDT

PM2.5 is modelled for this town — no monitoring station is close enough for a live AQHI.

HotelsRentalsDirections
Estes Park
Cel-shaded illustration of Estes Park
#7Estes ParkPM2.5 2.6~1 h drivesaves 1.1 cigs/wk

Colorado· PM2.5 2.6 µg/m³

Gateway town to Rocky Mountain National Park near 7,500 feet, where high-elevation air sits well above the Front Range, with lodges and cabins.

58% cleaner than home — pack the car.

PM2.5 is 2.6 µg/m³ here vs 6.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 2.6/22 × 7 = 0.8 here; 6.2/22 × 7 = 2.0 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

3.6 µg/m³ less fine-particle pollution than Boulder right now

58% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 27, 8:12 p.m. EDT

PM2.5 is modelled for this town — no monitoring station is close enough for a live AQHI.

HotelsRentalsDirections
Georgetown
Cel-shaded illustration of Georgetown
#8GeorgetownPM2.5 3.1Checking road routesaves 1.0 cigs/wk

Colorado· PM2.5 3.1 µg/m³

Historic mining town near 8,500 feet on I-70 in Clear Creek Canyon, with cool mountain-valley air.

50% cleaner than home — pack the car.

PM2.5 is 3.1 µg/m³ here vs 6.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 3.1/22 × 7 = 1.0 here; 6.2/22 × 7 = 2.0 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

3.1 µg/m³ less fine-particle pollution than Boulder right now

50% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 27, 8:27 p.m. EDT

PM2.5 is modelled for this town — no monitoring station is close enough for a live AQHI.

HotelsRentalsDirections
Still smoky
Fort Collins
Cel-shaded illustration of Fort Collins
#9Fort CollinsPM2.5 3.9~1 h 10 min drivesaves 0.7 cigs/wk

Colorado· PM2.5 3.9 µg/m³

A major Colorado city with broad lodging options and live air-quality readings for comparison when smoke shifts across the region.

About the same air — still smoky.

PM2.5 is 3.9 µg/m³ here vs 6.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 3.9/22 × 7 = 1.2 here; 6.2/22 × 7 = 2.0 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

2.3 µg/m³ less fine-particle pollution than Boulder right now

37% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 27, 7:00 p.m. EDT

PM2.5 is modelled for this town — no monitoring station is close enough for a live AQHI.

HotelsRentalsDirections
Still smoky
Denver
Cel-shaded illustration of Denver
#10DenverPM2.5 4.9~40 min drivesaves 0.4 cigs/wk

Colorado· PM2.5 4.9 µg/m³

A major Colorado city with broad lodging options and live air-quality readings for comparison when smoke shifts across the region.

About the same air — still smoky.

PM2.5 is 4.9 µg/m³ here vs 6.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 4.9/22 × 7 = 1.6 here; 6.2/22 × 7 = 2.0 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
21% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 27, 7:00 p.m. EDT

PM2.5 is modelled for this town — no monitoring station is close enough for a live AQHI.

HotelsRentalsDirections
Still smoky
Aurora
Cel-shaded illustration of Aurora
#11AuroraPM2.5 4.9Checking road routesaves 0.4 cigs/wk

Colorado· PM2.5 4.9 µg/m³

A major Colorado city with broad lodging options and live air-quality readings for comparison when smoke shifts across the region.

About the same air — still smoky.

PM2.5 is 4.9 µg/m³ here vs 6.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 4.9/22 × 7 = 1.6 here; 6.2/22 × 7 = 2.0 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
21% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 27, 7:00 p.m. EDT

PM2.5 is modelled for this town — no monitoring station is close enough for a live AQHI.

HotelsRentalsDirections
Still smoky
Evergreen
Cel-shaded illustration of Evergreen
#12EvergreenPM2.5 5.4Checking road route

Colorado· PM2.5 5.4 µg/m³

Foothills mountain town near 7,200 feet west of Denver, ringed by national forest with cooler air.

About the same air — still smoky.

PM2.5 is 5.4 µg/m³ here vs 6.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 5.4/22 × 7 = 1.7 here; 6.2/22 × 7 = 2.0 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
13% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 27, 7:00 p.m. EDT

PM2.5 is modelled for this town — no monitoring station is close enough for a live AQHI.

HotelsRentalsDirections
Vail
Cel-shaded illustration of Vail
#13VailPM2.5 1.6~2 h 20 min drivesaves 1.5 cigs/wk

Colorado· PM2.5 1.6 µg/m³

Purpose-built alpine resort at 8,150 feet in the White River high country, with cool mountain air and a large base of lodges and condos.

74% cleaner than home — pack the car.

PM2.5 is 1.6 µg/m³ here vs 6.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 1.6/22 × 7 = 0.5 here; 6.2/22 × 7 = 2.0 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

4.6 µg/m³ less fine-particle pollution than Boulder right now

74% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 27, 8:12 p.m. EDT

PM2.5 is modelled for this town — no monitoring station is close enough for a live AQHI.

HotelsRentalsDirections
Grand Lake
Cel-shaded illustration of Grand Lake
#14Grand LakePM2.5 1.6~2 h 35 min drivesaves 1.5 cigs/wk

Colorado· PM2.5 1.6 µg/m³

Village on Colorado's largest natural lake at the west gate of Rocky Mountain National Park near 8,400 feet, with lakeside lodges.

74% cleaner than home — pack the car.

PM2.5 is 1.6 µg/m³ here vs 6.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 1.6/22 × 7 = 0.5 here; 6.2/22 × 7 = 2.0 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

4.6 µg/m³ less fine-particle pollution than Boulder right now

74% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 27, 8:12 p.m. EDT

PM2.5 is modelled for this town — no monitoring station is close enough for a live AQHI.

HotelsRentalsDirections
Buena Vista
Cel-shaded illustration of Buena Vista
#15Buena VistaPM2.5 1.7Checking road routesaves 1.4 cigs/wk

Colorado· PM2.5 1.7 µg/m³

Arkansas River town near 7,900 feet ringed by fourteeners, a whitewater base with cool high-country air.

73% cleaner than home — pack the car.

PM2.5 is 1.7 µg/m³ here vs 6.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 1.7/22 × 7 = 0.5 here; 6.2/22 × 7 = 2.0 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

4.5 µg/m³ less fine-particle pollution than Boulder right now

73% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 27, 8:27 p.m. EDT

PM2.5 is modelled for this town — no monitoring station is close enough for a live AQHI.

HotelsRentalsDirections
Carbondale
Cel-shaded illustration of Carbondale
#16CarbondalePM2.5 1.8Checking road routesaves 1.4 cigs/wk

Colorado· PM2.5 1.8 µg/m³

Roaring Fork Valley town near 6,200 feet below Mount Sopris, a quieter base than nearby Aspen.

71% cleaner than home — pack the car.

PM2.5 is 1.8 µg/m³ here vs 6.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 1.8/22 × 7 = 0.6 here; 6.2/22 × 7 = 2.0 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

4.4 µg/m³ less fine-particle pollution than Boulder right now

71% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 27, 8:27 p.m. EDT

PM2.5 is modelled for this town — no monitoring station is close enough for a live AQHI.

HotelsRentalsDirections
Breckenridge
Cel-shaded illustration of Breckenridge
#17BreckenridgePM2.5 1.9~2 h 10 min drivesaves 1.4 cigs/wk

Colorado· PM2.5 1.9 µg/m³

Historic ski town above 9,600 feet in the Colorado Rockies, where thin alpine air sits far above Denver's haze, with extensive lodging.

69% cleaner than home — pack the car.

PM2.5 is 1.9 µg/m³ here vs 6.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 1.9/22 × 7 = 0.6 here; 6.2/22 × 7 = 2.0 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

4.3 µg/m³ less fine-particle pollution than Boulder right now

69% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 27, 8:12 p.m. EDT

PM2.5 is modelled for this town — no monitoring station is close enough for a live AQHI.

HotelsRentalsDirections
Albuquerque
Cel-shaded illustration of Albuquerque
#18AlbuquerquePM2.5 0.2Checking road routesaves 1.9 cigs/wk

New Mexico· PM2.5 0.2 µg/m³

A major New Mexico city with broad lodging options and live air-quality readings for comparison when smoke shifts across the region.

97% cleaner than home — pack the car.

PM2.5 is 0.2 µg/m³ here vs 6.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 0.2/22 × 7 = 0.1 here; 6.2/22 × 7 = 2.0 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

6 µg/m³ less fine-particle pollution than Boulder right now

97% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 27, 7:00 p.m. EDT

PM2.5 is modelled for this town — no monitoring station is close enough for a live AQHI.

HotelsRentalsDirections
Vernal
Cel-shaded illustration of Vernal
#19VernalPM2.5 0.7Checking road routesaves 1.8 cigs/wk

Utah· PM2.5 0.7 µg/m³

Uinta Basin gateway town to Dinosaur National Monument, remote from urban sources with motels.

89% cleaner than home — pack the car.

PM2.5 is 0.7 µg/m³ here vs 6.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 0.7/22 × 7 = 0.2 here; 6.2/22 × 7 = 2.0 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

5.5 µg/m³ less fine-particle pollution than Boulder right now

89% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 27, 7:00 p.m. EDT

PM2.5 is modelled for this town — no monitoring station is close enough for a live AQHI.

HotelsRentalsDirections
Lake City
Cel-shaded illustration of Lake City
#20Lake CityPM2.5 0.9Checking road routesaves 1.7 cigs/wk

Colorado· PM2.5 0.9 µg/m³

Remote San Juans town near 8,700 feet beside Lake San Cristobal, with cool alpine-lake air.

85% cleaner than home — pack the car.

PM2.5 is 0.9 µg/m³ here vs 6.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 0.9/22 × 7 = 0.3 here; 6.2/22 × 7 = 2.0 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

5.3 µg/m³ less fine-particle pollution than Boulder right now

85% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 27, 8:27 p.m. EDT

PM2.5 is modelled for this town — no monitoring station is close enough for a live AQHI.

HotelsRentalsDirections
Bad week ahead? Check the 7-day outlook — if it won’t clear, book the trip

7-day outlook

Plan the next seven days

Pick a day, or compare the whole week. Weather is forecast; air quality is the latest available reading.

Loading the week…

Finding the nicest days and reachable cities.

Observed Jul 27, 7:00 p.m. EDTLast scan Jul 27, 8:27 p.m. EDT · 53 min ago

Why live rankings? Smoke plumes are patchy and shift with the wind, so no direction is reliably cleaner. This list is recalculated from live PM2.5 every hour — and if everything nearby is smoky, it says so.

How we work this out →

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What this means · Boulder

Phew.

2.0cigarettes

per week, if this air holds

Act two · The scale

Where today lands

From a crisp horizon to smoke you can taste — here’s your reading on it.

6.2 µg/m³
CrispSome smokeHeavy smoke

Act three · The ladder

What each rung feels like

  • 0–3µg/m³Natural. About as clean as outdoor air realistically gets.
  • 3–5µg/m³Clean. Crisp, destination-worthy air.
  • 5–9µg/m³Good. Clean city air; most people will not notice anything today.
  • 9–15µg/m³Elevated. Usually no big deal today; sensitive lungs may notice hard exercise.
  • 15–35µg/m³Polluted. Smoke or traffic pollution is now worth acting on.
  • 35–55µg/m³Unhealthy. Symptoms become more likely, especially with asthma or heart disease.
  • 55+µg/m³Severe. Everyone should reduce exposure and clean the indoor air.

Act four · The fine print

The receipts

What is PM2.5?

Fine particles about 30× thinner than a human hair — small enough to slip through your lungs and into your bloodstream. We measure them inµg/m³: micrograms of particle mass in a cubic metre of air.

The math

PM2.5 here is 6.2 µg/m³.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at this level: 6.2/22 × 7 = 2.0 cigarettes.A long-term health-risk equivalence, not literal smoking.See how we work it out →
See the full method →