The United States spans vast distances and offers thrilling routes that many enthusiasts hope to experience someday. Past requests for top driving roads brought mentions of California's Pacific Coast Highway, busy downtown Los Angeles interstates, and scenic paths throughout the Finger Lakes region.

Yet certain routes attract only the most daring travelers. These represent the tallest highways across the country. With summits exceeding 12,000 feet, they present distinct obstacles for those who attempt them.

Challenges involve harsh weather conditions, limited visibility, and elevation effects that impact both people and machines. Few qualify as truly hazardous, however. With sensible preparation, adventurous drivers can navigate them without major issues.

Here are the five highest paved roads in America. Four lie in Colorado while one calls for travel to Hawaii. Colorado emerges as the prime destination for high-altitude adventures, and with Pikes Peak among the leaders, these paths demand courage from all who drive them.

Cottonwood Pass, Colorado - maximum elevation of 12,126 feet

Colorado's Cottonwood Pass opens the list at a peak of 12,126 feet. The route became straightforward after full paving finished in 2019. Earlier the Almont portion remained unpaved. Today a standard two-wheel-drive vehicle handles it well, though tougher routes elsewhere often favor four-wheel or all-wheel drive.

Altitude still creates concerns even on this accessible road. Snow closes it outside May through October, limiting access to warmer periods. No fuel stops exist along the 57-mile stretch, requiring drivers to refuel in advance to prevent long delays in remote areas.

Though paved and lower than some others, Cottonwood Pass tests novice motorists. Narrow sections combined with steep drop-offs lead some visitors to halt midway out of fear.

Trail Ridge Road, Colorado - maximum elevation of 12,201 feet

Trail Ridge Road in Colorado reaches just 75 feet higher. It links Grand Lake and Estes Park inside Rocky Mountain National Park. Like Cottonwood Pass, it remains open only from May through October due to heavy snow at these heights.

Similar altitude problems appear here as well. Engine output drops while occupants face possible altitude sickness. The reward comes from scenic views of the Rockies that hikers usually reach only on foot, all from the comfort of a vehicle.

Many steep drop-offs lack guardrails. Clearing snow each spring requires workers to face strong winds and poor visibility, making the task hazardous.

Mauna Kea Access Road, Hawaii - maximum elevation of 13,781 feet

This Hawaii route stands apart as the sole entry outside Colorado and lacks complete paving. At 14.6 miles it packs steep grades, especially near the top, with a maximum of 15 percent and an average of 9.27 percent. Total elevation gain reaches 7,149 feet.

Most sections are paved, yet upper portions after the visitor center require four-wheel or all-wheel drive. The initial 6.5 miles to the center allow two-wheel-drive access. In 2022 a vehicle suffered brake failure on the upper road during bad weather, resulting in a fatal crash and injuries to others.

Pikes Peak Highway, Colorado - maximum elevation of 14,115 feet

Pikes Peak Highway ranks second nationally and hosts the famous International Hill Climb. The event has recorded seven fatalities over 110 years. Regular traffic also encounters difficulties on the twisting route.

Lower sections offer scenic two-lane driving amid trees that shield views of the rising elevation. Above roughly 12,500 feet trees vanish, the road narrows without guardrails, and rangers inspect brakes at checkpoints. Altitude sickness remains a risk without proper planning.

Mount Blue Sky Scenic Byway, Colorado - maximum elevation of 14,130 feet

This Colorado byway, recently reopened after nearly two years of repairs, claims the title of North America's highest paved road at 14,130 feet. The 28-mile route climbs more than 7,000 feet.

Standard high-altitude issues apply, including reduced oxygen, weaker vehicle performance, and weather risks. No guardrails exist and vehicles longer than 30 feet are banned. Engine braking helps preserve regular brakes, with pullouts provided for cooling. The average grade stays moderate at 4.54 percent. Recent work addressed crumbling sections, and timed entry tickets now manage traffic and protect the surroundings.