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Aerial of golden fall aspens and a mountain road

Altitude and health

How does altitude affect health in Colorado mountain towns?

Where you sleep sets the altitude risk, and where the nearest trauma center sits sets how far help is. Both change town by town.

A live person answers. Not a robot, not a phone tree. Updated September 2026.

Photos: Aerial of golden fall aspens and a mountain road, Taylor Brandon (Unsplash).

The short answer

The CDC says altitude illness risk begins at sleeping elevations of 8,000 feet and up, and about 25% of visitors sleeping above 8,000 feet in Colorado get acute mountain sickness. Breckenridge sits at 9,735 feet and Conifer at 8,262 feet; Evergreen sits at 7,056 feet. Summit County, Vail, Aspen and Steamboat have Level III trauma centers. Talk with your doctor about altitude.

Risk line

8,000 feet.

The CDC puts altitude illness risk at sleeping elevations of 8,000 feet and up.

Visitors

About 25%.

Share of visitors sleeping above 8,000 feet in Colorado who get acute mountain sickness.

Highest town here

Breckenridge, 9,735 ft.

USGS point elevation in town.

Level I

St. Anthony, Lakewood.

A Level I trauma center on the state list.

What does the CDC say about altitude illness?

  • Sleeping elevation counts. Risk begins at sleeping elevations of 8,000 feet and up.
  • Colorado visitors. About 25% of visitors sleeping above 8,000 feet in Colorado get acute mountain sickness.
  • See a doctor. The Kenna Real Estate Group does not give medical advice. Ask your doctor before a move to altitude.

Which mountain towns sit above 8,000 feet?

  • Summit County. Breckenridge 9,735 ft, Keystone 9,169 ft, Dillon 9,127 ft, Frisco 9,062 ft, Silverthorne 8,747 ft.
  • Grand County. Winter Park 8,801 ft and Fraser 8,580 ft.
  • Front Range. Black Hawk 8,534 ft, Georgetown 8,518 ft, Central City 8,499 ft, Allenspark 8,493 ft, Woodland Park 8,480 ft, Conifer 8,262 ft, Nederland 8,233 ft.
  • Resorts. Snowmass Village 8,208 ft and Vail 8,179 ft.

Elevations are USGS point elevations at the town center. A home up the hill sits higher.

Which mountain towns sit below 8,000 feet?

  • Foothills. Golden 5,673 ft, Morrison 5,765 ft, Evergreen 7,056 ft, Kittredge 6,907 ft, Indian Hills 6,852 ft, Pine 6,823 ft.
  • I-70 and US-285. Idaho Springs 7,527 ft and Bailey 7,746 ft.
  • North and west. Lyons 5,366 ft, Steamboat Springs 6,731 ft, Estes Park 7,529 ft, Aspen 7,890 ft.

Where are the trauma centers near Colorado mountain towns?

  • Level III. St. Anthony Summit (Frisco), Vail Health, Aspen Valley, UCHealth Yampa Valley (Steamboat).
  • Level IV. UCHealth Estes Valley (Estes Park) and Pikes Peak Regional (Woodland Park).
  • Level I. St. Anthony in Lakewood.
  • Evergreen and Conifer. No trauma center in either town on the state list.

I-70 crosses the Eisenhower-Johnson Tunnel at an average of 11,112 feet on the way to Summit County. Call the Kenna Real Estate Group at 303-955-4220 to compare towns by elevation and hospital access.

Questions

Quick answers.

At what elevation does altitude sickness start?

The CDC puts the risk at sleeping elevations of 8,000 feet and up.

How many Colorado visitors get altitude sickness?

About 25% of visitors sleeping above 8,000 feet in Colorado get acute mountain sickness, per the CDC.

What is the elevation of Breckenridge?

9,735 feet at the USGS point elevation in town.

Is there a trauma center in Evergreen, Colorado?

No. Neither Evergreen nor Conifer has a trauma center on the state list. St. Anthony in Lakewood is a Level I center.

What trauma center serves Summit County?

St. Anthony Summit in Frisco, a Level III trauma center.

The map

Where the mountain towns are.

Every pin opens that town's page. Drive times from downtown Denver, without traffic.

Colorado mountain towns near Denver: 34 mountain towns with drive times to downtown Denver.DenverEvergreen: 28.0 miles, 42 minutes to Denver without trafficConifer: 28.3 miles, 41 minutes to Denver without trafficGolden: 14.8 miles, 24 minutes to Denver without trafficLookout Mountain (Golden): 18.9 miles, 32 minutes to Denver without trafficGenesee: 18.3 miles, 29 minutes to Denver without trafficMorrison: 16.7 miles, 25 minutes to Denver without trafficIndian Hills: 25.6 miles, 46 minutes to Denver without trafficKittredge: 26.4 miles, 44 minutes to Denver without trafficPine: 46.6 miles, 75 minutes to Denver without trafficBuffalo Creek: 44.2 miles, 69 minutes to Denver without trafficBailey: 44.0 miles, 65 minutes to Denver without trafficWoodland Park: 83.7 miles, 104 minutes to Denver without trafficIdaho Springs: 32.0 miles, 44 minutes to Denver without trafficGeorgetown: 44.8 miles, 60 minutes to Denver without trafficBlack Hawk: 37.2 miles, 56 minutes to Denver without trafficCentral City: 37.6 miles, 55 minutes to Denver without trafficNederland: 45.0 miles, 70 minutes to Denver without trafficAllenspark: 61.7 miles, 99 minutes to Denver without trafficLyons: 44.5 miles, 63 minutes to Denver without trafficEstes Park: 67.8 miles, 102 minutes to Denver without trafficBreckenridge: 79.3 miles, 106 minutes to Denver without trafficFrisco: 70.7 miles, 91 minutes to Denver without trafficSilverthorne: 67.1 miles, 86 minutes to Denver without trafficDillon: 67.9 miles, 88 minutes to Denver without trafficKeystone: 73.9 miles, 98 minutes to Denver without trafficWinter Park: 68.3 miles, 100 minutes to Denver without trafficFraser: 71.0 miles, 105 minutes to Denver without trafficVail: 97.3 miles, 122 minutes to Denver without trafficAvon: 105.8 miles, 131 minutes to Denver without trafficEdwards: 116.8 miles, 157 minutes to Denver without trafficAspen: 198.3 miles, 245 minutes to Denver without trafficSnowmass Village: 196.9 miles, 243 minutes to Denver without trafficSteamboat Springs: 155.6 miles, 205 minutes to Denver without trafficCrested Butte: 225.8 miles, 304 minutes to Denver without trafficEvergreenConiferGoldenMorrisonPineBaileyWoodland ParkIdaho SpringsGeorgetownNederlandLyonsEstes ParkBreckenridgeWinter ParkVailAspenSteamboat SpringsCrested Butte
  • Front Range foothills
  • I-70 corridor
  • Peak to Peak
  • Summit County
  • Resort
  • Tap a town to open its page

Outline: U.S. Census Bureau. Roads from downtown Denver: OSRM on OpenStreetMap. Town points: OpenStreetMap and USGS. Drive times without traffic.

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Colorado Mountain Home Finder is part of the Kenna Real Estate Group at Keller Williams DTC (KWDTC).