Boreas Pass, Colorado: Railroad-Grade Hikes, the Scenic Drive, and Fall Aspens Near Breckenridge

Boreas Pass is an 11,481-foot gap on the Continental Divide between Breckenridge and Como, and it's one of the easiest ways in Colorado to stand on the Divide without a hard climb. You can drive a regular car to the top on a dirt road that used to be a railroad, walk a nearly flat trail along the old grade, and be back in Breckenridge for lunch. That combination of high-country scenery and gentle terrain is rare, and it makes Boreas Pass a favorite for families, cyclists, leaf-peepers, and anyone still getting used to the altitude.

The road follows the bed of a narrow-gauge railroad that crossed here in the 1880s, so the grade almost never gets steep. That's the whole appeal. You gain views normally reserved for peak-baggers while walking a path a locomotive once climbed.

This guide covers the drive, the truth about whether your car can handle the road, the two best hikes, when the aspens turn, and what to pack for a spot that sits well above 11,000 feet.

What you'll learn

• Quick stats for the pass and the main trails
• The drive and how the road works
• Can a regular car make it?
• The railroad history and what's still standing up top
• The best hikes from the pass
• When to go and fall color timing
• Boreas Pass in winter
• What to pack
• Where to stay and nearby trails
• FAQs

Quick stats {#quick-stats}

The drive and how the road works {#the-drive}

Boreas Pass Road leaves the south end of Breckenridge as a paved street and turns to dirt after a mile or so. From there it climbs about 10 miles to the summit, switchbacking gently above town before traversing open slopes with big views back toward the Tenmile Range and Quandary Peak.

Because the road sits on an old railroad grade, it holds a steady, forgiving pitch the whole way. There are a few narrow, shelf-like sections where two cars have to slow down and cooperate, but nothing white-knuckle. Give yourself 30 to 45 minutes to the top, more if you stop for photos, which you will.

At the summit you'll find a small parking area, the historic buildings, interpretive signs, and the county line. The road keeps going down the far side another 11 miles or so to Como, a tiny former railroad town near Fairplay. Driving the whole thing top to bottom is a scenic backway, not a shortcut, so plan on a leisurely afternoon rather than a quick connector.

Can a regular car make it? {#driving}

Mostly, yes. Boreas Pass Road is one of the more accessible high mountain roads in Colorado. When it's dry, a passenger sedan driven with a little patience handles it fine. The surface is graded dirt with some washboard and the occasional embedded rock, not the boulder-hopping you'd meet on a true four-wheel-drive route.

The caveats are weather and timing. After heavy rain the road gets slick and rutted, and low-clearance cars scrape more. Early season, snowdrifts can linger in shaded cuts until the county clears them. And the road closes for winter once the snow piles up, usually sometime in November, reopening in late spring. Check current conditions with the White River or Pike National Forest office before an early or late trip, and don't drive around a closure gate.

One more thing worth saying out loud: you're at 11,481 feet up top. That elevation hits some people even when they've just driven there. If you feel a pounding headache or nausea, head back down. Our altitude sickness guide explains what to watch for.

The railroad history up top {#history}

In 1882 the Denver, South Park and Pacific pushed a narrow-gauge line over this saddle, making Boreas one of the highest railroad crossings in North America. Trains hauled ore, timber, and passengers between the South Park mining camps and Breckenridge, fighting wind and snow that shut the line down for weeks at a time. The pass takes its name from Boreas, the Greek god of the north wind, and the crews who lived up here earned it.

The stone-and-timber Section House still stands at the summit, built to house the workers who kept the tracks clear. Next to it sits a tiny pioneer-era log cabin, one of the oldest buildings in the county. The Summit Huts Association maintains both and rents them as backcountry huts in winter. In summer, volunteers sometimes open the Section House as a small museum on weekends.

About three miles down the Breckenridge side you'll pass Bakers Tank, a restored wooden water tank that once refilled the thirsty steam locomotives. The last train ran in 1937, the rails came up, and the grade slowly became the road and trail people use today.

The best hikes from the pass {#hikes}

You've got two standout options, and both use that gentle railroad grade to your advantage.

Bakers Tank (easy, ~6 miles round trip). This is the classic. From the trailhead where the plowed road ends on the Breckenridge side, follow the old grade as it curves along the hillside to the restored water tank. It climbs so gradually you'll barely notice, which makes it a great pick for kids, for a mellow trail run, or for a warm-up day while you acclimate. Mountain bikers love it for the same reason. Turn around at the tank or keep going toward the summit if you want more.

Black Powder Pass (moderate, ~3.5 to 4 miles round trip). Start right at the Boreas Pass summit and climb north on a real trail toward a 12,150-foot saddle tucked below Boreas Mountain. You gain about 700 feet, break above the last trees, and land in wide-open tundra with marmots whistling from the rocks. It's the better choice when you want a summit-style payoff without a summit-style effort.

Strong hikers sometimes push past the saddle toward the ridge and 13,082-foot Boreas Mountain, but that's off-trail tundra travel, so save it for a clear morning with good footing. Whichever you pick, watch the sky. Afternoon thunderstorms build fast up here in July and August, and there's no shelter above the trees.