As thousands of visitors travel to Colorado’s ski resorts for spring break, the Colorado Department of Transportation (CDOT) is urging mountain-goers to plan ahead to avoid impaired driving.
The organization has warned drivers that the effects of higher altitude on the body — which include dehydration, tiring more easily and less oxygen — can potentially increase impairment. That means even moderate consumption of cannabis or alcohol can lead to a stronger impact than expected.
According to CDOT, there were 203 fatalities on Colorado roads in 2024 that involved an impaired driver, accounting for 31% of all traffic deaths during the year. Last year, law enforcement agencies in Eagle and Summit counties issued more than 120 DUIs between February and April during impaired driving enforcement periods.
“Every year, we see a spike in DUIs during spring break, many of which involve visitors who underestimate altitude’s impact on alcohol impairment and the potency of cannabis products,” said Summit County Sheriff Jaime FitzSimons.
“We want everyone to stay safe while enjoying the mountains. Please plan ahead, make responsible choices, and don’t put yourself or others in danger.”
CDOT has offered the following advice to travelers heading to the mountains this spring:
- Recognize that driving while high or impaired is illegal and dangerous.
- Understand that altitude, dehydration and unfamiliarity with cannabis products can amplify impairment, especially for out-of-state visitors.
- Designate a sober driver or wait until safely at their final destination before legally consuming cannabis.
- Enjoy the mountains responsibly and avoid ruining their vacation with a DUI, serious injury or fatality.
