
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 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.
8,000 feet.
The CDC puts altitude illness risk at sleeping elevations of 8,000 feet and up.
About 25%.
Share of visitors sleeping above 8,000 feet in Colorado who get acute mountain sickness.
Breckenridge, 9,735 ft.
USGS point elevation in town.
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.
Sources
- CDC Yellow Book, altitude illness
- Town elevations: USGS 3DEP point elevations
- CDPHE, Colorado trauma center designations
- CDOT, Eisenhower-Johnson Tunnel
Rules, rates and dates change. The county, town or state office named above has the current version.
Go deeper
Where to go next.
The map
Where the mountain towns are.
Every pin opens that town's page. Drive times from downtown Denver, without traffic.
- 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.
Private consultation
Ask us about your mountain home.
303-955-4220A live person answers. Not a robot, not a phone tree.
- Every mountain town. Evergreen and Conifer to Summit County and Steamboat.
- Wildfire, water, winter. Insurance, well, septic and access checked before you offer.
- One point of contact. From the first call to the closing table.
Colorado Mountain Home Finder is part of the Kenna Real Estate Group at Keller Williams DTC (KWDTC).

