ToClearSkies

Live readout · Observed —

Good air — normal outdoor plans

Boulder is breathing 2.3 cigarettes a week

Nothing cleaner nearby How we count it →

A good everyday baseline, though zero particle risk does not exist.

7.2
PM2.5 µg/m³
40
US AQI
Good
Category
2.4
Cleanest in reach · µg/m³
Look farther for cleaner air

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.

You may already have the cleanest nearby air.No meaningfully cleaner place has a verified road route within 3 hours. Widen the range or show worse air for context.

Every town is also available in the ranked list.
Boulder Low smoke · AQI 0–50 Some pollution · AQI 51–100 Unhealthy (sensitive) · AQI 101–150 Unhealthy+ · AQI 151+
Top pick
Georgetown
Cel-shaded illustration of Georgetown
#1GeorgetownLow smoke · AQI 31Checking road routesaves 0.5 cigs/wk

Colorado· PM2.5 5.5 µg/m³

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

About the same air — still smoky.

PM2.5 is 5.5 µg/m³ here vs 7.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 5.5/22 × 7 = 1.8 here; 7.2/22 × 7 = 2.3 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
24% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 22, 10:27 a.m. EDT

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

HotelsRentalsDirections
Still smoky
Estes Park
Cel-shaded illustration of Estes Park
#2Estes ParkLow smoke · AQI 33~1 h drivesaves 0.4 cigs/wk

Colorado· PM2.5 5.9 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.

About the same air — still smoky.

PM2.5 is 5.9 µg/m³ here vs 7.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 5.9/22 × 7 = 1.9 here; 7.2/22 × 7 = 2.3 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
18% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 22, 10:12 a.m. EDT

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

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Still smoky
Dillon
Cel-shaded illustration of Dillon
#3DillonLow smoke · AQI 33Checking road routesaves 0.4 cigs/wk

Colorado· PM2.5 6 µg/m³

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

About the same air — still smoky.

PM2.5 is 6 µg/m³ here vs 7.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 6/22 × 7 = 1.9 here; 7.2/22 × 7 = 2.3 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
17% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 22, 10:27 a.m. EDT

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

HotelsRentalsDirections
Still smoky
Silverthorne
Cel-shaded illustration of Silverthorne
#4SilverthorneLow smoke · AQI 33Checking road routesaves 0.4 cigs/wk

Colorado· PM2.5 6 µg/m³

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

About the same air — still smoky.

PM2.5 is 6 µg/m³ here vs 7.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 6/22 × 7 = 1.9 here; 7.2/22 × 7 = 2.3 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
17% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 22, 10:27 a.m. EDT

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

HotelsRentalsDirections
Still smoky
Frisco
Cel-shaded illustration of Frisco
#5FriscoLow smoke · AQI 33Checking road routesaves 0.4 cigs/wk

Colorado· PM2.5 6 µg/m³

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

About the same air — still smoky.

PM2.5 is 6 µg/m³ here vs 7.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 6/22 × 7 = 1.9 here; 7.2/22 × 7 = 2.3 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
17% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 22, 10:27 a.m. EDT

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

HotelsRentalsDirections
Still smoky
Nederland
Cel-shaded illustration of Nederland
#6NederlandLow smoke · AQI 40Checking road route

Colorado· PM2.5 7.2 µg/m³

Mountain town near 8,200 feet above Boulder on the Peak to Peak Highway, with cool ridge air.

About the same air — still smoky.

PM2.5 is 7.2 µg/m³ here vs 7.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 7.2/22 × 7 = 2.3 here; 7.2/22 × 7 = 2.3 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
0% worse airChecking trip easeChecking nearby staysChecking today's weather

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

HotelsRentalsDirections
Still smoky
Idaho Springs
Cel-shaded illustration of Idaho Springs
#7Idaho SpringsLow smoke · AQI 40Checking road route

Colorado· PM2.5 7.2 µg/m³

Clear Creek Canyon hot-springs town near 7,500 feet, a mountain gateway west of Denver with historic inns.

About the same air — still smoky.

PM2.5 is 7.2 µg/m³ here vs 7.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 7.2/22 × 7 = 2.3 here; 7.2/22 × 7 = 2.3 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
0% worse airChecking trip easeChecking nearby staysChecking today's weather

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

HotelsRentalsDirections
Still smoky
Winter Park
Cel-shaded illustration of Winter Park
#8Winter ParkLow smoke · AQI 41Checking road route

Colorado· PM2.5 7.3 µg/m³

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

Worse air than home. Don't bother.

PM2.5 is 7.3 µg/m³ here vs 7.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 7.3/22 × 7 = 2.3 here; 7.2/22 × 7 = 2.3 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
1% worse airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 22, 10:27 a.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
#9AuroraLow smoke · AQI 41Checking road route

Colorado· PM2.5 7.3 µg/m³

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

Worse air than home. Don't bother.

PM2.5 is 7.3 µg/m³ here vs 7.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 7.3/22 × 7 = 2.3 here; 7.2/22 × 7 = 2.3 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
1% worse airChecking trip easeChecking nearby staysChecking today's weather

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

HotelsRentalsDirections
Still smoky
Granby
Cel-shaded illustration of Granby
#10GranbyLow smoke · AQI 41Checking road route

Colorado· PM2.5 7.3 µg/m³

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

Worse air than home. Don't bother.

PM2.5 is 7.3 µg/m³ here vs 7.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 7.3/22 × 7 = 2.3 here; 7.2/22 × 7 = 2.3 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
1% worse airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 22, 10:27 a.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
#11EvergreenLow smoke · AQI 41Checking road route

Colorado· PM2.5 7.4 µg/m³

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

Worse air than home. Don't bother.

PM2.5 is 7.4 µg/m³ here vs 7.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 7.4/22 × 7 = 2.4 here; 7.2/22 × 7 = 2.3 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
3% worse airChecking trip easeChecking nearby staysChecking today's weather

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
#12DenverLow smoke · AQI 43~40 min drive

Colorado· PM2.5 7.8 µg/m³

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

Worse air than home. Don't bother.

PM2.5 is 7.8 µg/m³ here vs 7.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 7.8/22 × 7 = 2.5 here; 7.2/22 × 7 = 2.3 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
8% worse airChecking trip easeChecking nearby staysChecking today's weather

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

HotelsRentalsDirections
Still smoky
Basalt
Cel-shaded illustration of Basalt
#13BasaltLow smoke · AQI 31Checking road routesaves 0.5 cigs/wk

Colorado· PM2.5 5.6 µg/m³

Roaring Fork Valley town at the Fryingpan confluence, with cool mountain-river air between Aspen and Glenwood.

About the same air — still smoky.

PM2.5 is 5.6 µg/m³ here vs 7.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 5.6/22 × 7 = 1.8 here; 7.2/22 × 7 = 2.3 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
22% cleaner airChecking trip easeChecking nearby staysChecking today's weather

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

HotelsRentalsDirections
Still smoky
Snowmass Village
Cel-shaded illustration of Snowmass Village
#14Snowmass VillageLow smoke · AQI 31Checking road routesaves 0.5 cigs/wk

Colorado· PM2.5 5.6 µg/m³

Purpose-built ski resort near 8,200 feet beside Aspen, with thin alpine air and a large condo base.

About the same air — still smoky.

PM2.5 is 5.6 µg/m³ here vs 7.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 5.6/22 × 7 = 1.8 here; 7.2/22 × 7 = 2.3 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
22% cleaner airChecking trip easeChecking nearby staysChecking today's weather

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

HotelsRentalsDirections
Still smoky
Breckenridge
Cel-shaded illustration of Breckenridge
#15BreckenridgeLow smoke · AQI 33~2 h 10 min drivesaves 0.4 cigs/wk

Colorado· PM2.5 6 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.

About the same air — still smoky.

PM2.5 is 6 µg/m³ here vs 7.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 6/22 × 7 = 1.9 here; 7.2/22 × 7 = 2.3 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
17% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 22, 10:12 a.m. EDT

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

HotelsRentalsDirections
Still smoky
Grand Lake
Cel-shaded illustration of Grand Lake
#16Grand LakeLow smoke · AQI 41~2 h 35 min drive

Colorado· PM2.5 7.3 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.

Worse air than home. Don't bother.

PM2.5 is 7.3 µg/m³ here vs 7.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 7.3/22 × 7 = 2.3 here; 7.2/22 × 7 = 2.3 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
1% worse airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 22, 10:12 a.m. EDT

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

HotelsRentalsDirections
Still smoky
Vail
Cel-shaded illustration of Vail
#17VailLow smoke · AQI 45~2 h 20 min drive

Colorado· PM2.5 8.1 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.

Worse air than home. Don't bother.

PM2.5 is 8.1 µg/m³ here vs 7.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 8.1/22 × 7 = 2.6 here; 7.2/22 × 7 = 2.3 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
12% worse airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 22, 10:12 a.m. EDT

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

HotelsRentalsDirections
Creede
Cel-shaded illustration of Creede
#18CreedeLow smoke · AQI 13Checking road routesaves 1.5 cigs/wk

Colorado· PM2.5 2.4 µg/m³

Remote San Juans mining town near 8,850 feet at the head of a box canyon, with historic inns.

67% cleaner than home — pack the car.

PM2.5 is 2.4 µg/m³ here vs 7.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 2.4/22 × 7 = 0.8 here; 7.2/22 × 7 = 2.3 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

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

67% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 22, 10:27 a.m. EDT

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

HotelsRentalsDirections
Chama
Cel-shaded illustration of Chama
#19ChamaLow smoke · AQI 13Checking road routesaves 1.5 cigs/wk

New Mexico· PM2.5 2.4 µg/m³

High-country railroad town near 7,900 feet on the Colorado border, with cool mountain-valley air.

67% cleaner than home — pack the car.

PM2.5 is 2.4 µg/m³ here vs 7.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 2.4/22 × 7 = 0.8 here; 7.2/22 × 7 = 2.3 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

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

67% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Jul 22, 10:27 a.m. EDT

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

HotelsRentalsDirections
Red River
Cel-shaded illustration of Red River
#20Red RiverLow smoke · AQI 14~6 h 5 min drivesaves 1.5 cigs/wk

New Mexico· PM2.5 2.5 µg/m³

Small ski town high in the Sangre de Cristos near 8,700 feet, a cool alpine base with lodges and cabins.

65% cleaner than home — pack the car.

PM2.5 is 2.5 µg/m³ here vs 7.2 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 2.5/22 × 7 = 0.8 here; 7.2/22 × 7 = 2.3 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

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

65% cleaner airChecking trip easeChecking nearby staysChecking today's weather

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.

Last scan Jul 22, 10:27 a.m. EDT · 34 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 →

Browse all 200 cities by province & state →

All 54 Canadian cities →
TorontoMontréalVancouverCalgaryEdmontonOttawaWinnipegQuébec CityHamiltonKitchener-WaterlooLondonHalifaxVictoriaWindsorOshawaSaskatoonReginaSt. CatharinesKelownaBarrieSherbrookeGuelphAbbotsfordKingstonGreater SudburySaguenayTrois-RivièresMonctonSaint JohnSt. John'sThunder BayPeterboroughLethbridgeNanaimoKamloopsMississaugaBramptonSault Ste. MarieNorth BayWhitehorsePrince GeorgeFort McMurrayMedicine HatFrederictonYellowknifeChilliwackBellevilleBrantfordSurreyLavalMarkhamVaughanBurnabyRichmond
All 145 U.S. cities →
New York CityLos AngelesChicagoHoustonPhoenixPhiladelphiaSan AntonioSan DiegoDallasFort WorthJacksonvilleAustinSan JoseCharlotteColumbusIndianapolisSan FranciscoSeattleDenverWashington, D.C.NashvilleOklahoma CityBostonPortlandLas VegasDetroitMemphisLouisvilleBaltimoreMilwaukeeAlbuquerqueTucsonFresnoSacramentoAtlantaKansas CityColorado SpringsOmahaRaleighMiamiVirginia BeachMinneapolisTulsaTampaWichitaClevelandNew OrleansPittsburghCincinnatiSt. LouisOrlandoBuffaloSalt Lake CityRichmondBirminghamCharlestonProvidenceHartfordGrand RapidsEugeneBoiseSpokaneMissoulaBillingsBozemanRenoBakersfieldStocktonModestoRiversideSan BernardinoChicoReddingSalemMedfordBendYakimaAnchorageEl PasoAmarilloLubbockLittle RockBaton RougeShreveportJacksonMobileMontgomeryKnoxvilleLexingtonDaytonToledoAkronFort WayneDes MoinesMadisonGreen BayFargoSioux FallsRapid CityAlbanyRochesterSyracuseWorcesterSpringfieldAllentownHarrisburgNorfolkGreensboroWinston-SalemDurhamColumbiaGreenvilleAugustaTallahasseeSarasotaFort MyersSt. PetersburgSpringfieldFort CollinsProvoOgdenHonoluluCorpus ChristiBellinghamTacomaOlympiaYumaErieScrantonYoungstownCantonPeoriaRockfordTopekaPensacolaLafayetteBeaumontWacoMcAllenLaredoMesaArlingtonAuroraAnaheimHenderson

What this means · Boulder

Phew.

2.3cigarettes

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.

7.2 µg/m³
CrispSome smokeHeavy smoke

Act three · The ladder

What each rung feels like

  • 0–3µg/m³Natural air. About as clean as outdoor air realistically gets.
  • 3–5µg/m³Exceptionally clean. Crisp, destination-worthy air.
  • 5–9µg/m³Good, not pristine. 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 for sensitive. Symptoms become more likely, especially with asthma or heart disease.
  • 55+µg/m³Unhealthy. 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 7.2 µg/m³.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at this level: 7.2/22 × 7 = 2.3 cigarettes.A long-term health-risk equivalence, not literal smoking.See how we work it out →
See the full method →