Longs Peak Keyhole Route: The Boulder Field, the Narrows, and the Turnaround Clock

Above the Keyhole, Longs Peak is not a trail and it is not a hike. The Ledges, the Trough, the Narrows and the Homestretch are exposed Class 3 scrambling marked by painted bullseyes, with no cables, no chains, no handrails and hundreds of feet of consequence beneath them. There is no maintained tread and no railing anywhere on that mile and a half. Longs has the highest fatality count of any standard route on any Colorado fourteener, and the majority of those deaths are falls on the upper mountain.

This article is editorial, not route beta. It cannot tell you whether the rock is dry today, whether the route is posted in technical conditions, or whether the weather will hold. Rocky Mountain National Park publishes that; read it the morning you go, and treat the Keyhole as a turnaround point you have already given yourself permission to use.

Current conditions, closures, and permits: Rocky Mountain National Park: Longs Peak conditions, the technical-conditions notice, and current closures (nps.gov)

Most famous hikes get harder gradually. Longs Peak does not. For roughly six miles it is a genuinely pleasant Colorado trail — packed dirt, switchbacks, a creek, treeline, tundra — the kind of grade you could hold a conversation on. Then it stops, and it stops twice.

The Park Service is precise about this in a way that is worth borrowing. The hiking trail ends at the Boulder Field, where tread gives way to a square mile of granite blocks. The climbing route begins a little higher, at a notch called the Keyhole. Between those two points you are on a mountain that has quietly stopped being a hike, and past the second one there is no tread at all — only paint on rock, and the paint is the only reason anyone knows where to go.

That discontinuity is the whole character of this mountain, and it is why Longs kills more people than any other standard fourteener route in Colorado while being one of the most attempted.

Trailhead: Longs Peak Ranger Station, 9,405 ft, off Highway 7 about nine miles south of Estes Park, Colorado
Summit: 14,259 ft — the only fourteener in Rocky Mountain National Park and the fifteenth highest in Colorado
Distance and gain: about 14.5 miles round trip and roughly 5,100 ft of elevation gain, by the park's figures
Where the trail ends: the Keyhole, 13,150 ft, about six miles in
The four sections above it: the Ledges, the Trough (about 600 ft of loose rock), the Narrows, and the Homestretch (about 300 ft of slab)
Difficulty: Class 3 scrambling, exposed, unroped, marked only by painted bullseyes
Typical day: 12 to 16 hours car to car, starting between 1:00 and 3:00 AM
Season: the route is generally “in” from mid-July to mid-September; outside that window it is a mountaineering objective needing an axe and crampons
Permits: none required to day hike; a backcountry permit is required to camp at the Boulder Field, and parking is the real bottleneck

The six miles that are just a hike

You leave the Longs Peak Ranger Station at 9,405 feet, almost always in the dark. The trail climbs through Goblins Forest, crosses Alpine Brook, and breaks out of the trees somewhere around 11,000 feet, which on a clear night is where you turn off your headlamp because the sky is doing enough.

At Chasm Junction the Chasm Lake trail peels off left toward the base of the Diamond — Longs' 1,000-foot vertical east face, and one of the great alpine walls in North America. The Keyhole Route goes right, climbs to Granite Pass, and traverses north and west across open tundra. This is the part of the day people forget afterward. It is also, at six miles and roughly 3,400 feet of gain before anything technical begins, a substantial hike in its own right that most people are doing on three hours of sleep.

The Boulder Field is the real trailhead

At 12,800 feet the tundra ends and the Boulder Field begins: a square mile of granite blocks, some of them the size of cars, that you cross by stepping from one to the next for the better part of an hour. There are permitted backcountry campsites here and a privy, and hikers who score a permit and split the climb into two days are doing the single most effective thing available to them on this mountain.

Everyone else arrives here somewhere between 5:00 and 7:00 AM having already walked six miles, and this is the honest place to make a decision. You can see the Keyhole from the Boulder Field. You can see the weather. You know how your legs feel and how long the last mile took. Turning around here is a complete day out — six miles, 3,400 feet, an alpine sunrise and a view of the Diamond — and it costs you nothing but a summit.

The Ranger Station to the summit — the six miles of trail, then the mile and a half above the Keyhole where there is no trail at all. Stitched from OpenStreetMap ways: the East Longs Peak Trail plus the five separately named upper sections.

The Keyhole is a door, and it is also a decision

The Keyhole is a notch at 13,150 feet, and walking through it is one of the genuinely startling moments in American hiking. The east side is the sunlit boulder-strewn slope you just climbed. The west side drops away into Glacier Gorge, and the wind comes through the gap like it has been waiting. This is the point the Park Service marks as the start of the climbing route.

There is a stone shelter just below it, the Agnes Vaille Memorial Shelter, built for a climber who died on the mountain in 1925 after a winter ascent. It is a hut commemorating a death, positioned at the exact point where the hiking ends. Nobody planned that as a metaphor, but it works as one.

Past the Keyhole there is no tread to follow, no maintained surface, and nothing to hold. The route is marked with painted bullseyes — red-and-yellow targets on the rock — and in poor visibility people lose them, which is its own category of accident. If the rock is wet, if there is verglas, if cloud is building, or if it is already late, the Keyhole is where a good day turns around.

Four sections, and what each one asks

The Ledges. A traverse across the west face on shelves that are wide enough until they are not, with Glacier Gorge underneath. Exposed Class 3, bullseye to bullseye.

The Trough. A gully of about 600 vertical feet of loose rock, and reliably the slowest part of the day. It is also where parties above you can knock rock down onto parties below, which is the argument for a helmet and for not stacking up.

The Narrows. The section people picture when they picture Longs: a ledge across the south face with a great deal of air beneath it. It is not technically difficult. It is simply somewhere you cannot afford a mistake, and it is where the exposure becomes the whole experience.

The Homestretch. About 300 feet of granite slab at an angle that is fine going up and considerably less fine coming down, finishing abruptly on a flat summit the size of a couple of football fields.

Why the descent is what kills people

The consistent pattern in Longs Peak accidents is that they happen on the way down, on the Narrows and the Homestretch, to people who got up fine. Three things compound: you are tired, you have been at altitude for ten hours, and down-climbing exposed slab is harder and less intuitive than climbing it. Add afternoon moisture to the rock and the margin disappears.

The practical consequence is that summiting is not the halfway point of the risk, it is roughly the start of it. Experienced parties treat the descent of the technical sections as the part of the day they concentrate hardest on, and they down-climb the Homestretch facing in, deliberately, rather than walking down it because it seems walkable.

The clock is the whole strategy

Everything about how this hike is done is downstream of one fact: the Front Range builds afternoon thunderstorms, Longs is the highest thing for a long way, and you cannot be on exposed Class 3 rock when that happens. The rule people repeat is off the summit by noon, and on Longs it should be earlier.

Working backwards from that gives you the 1:00-to-3:00 AM start that seems theatrical until you do the arithmetic: six miles and 3,400 feet to the Boulder Field, an hour of boulder-hopping, then a mile and a half of scrambling that takes two to four hours. Parties that leave at 5:00 AM are frequently making the summit decision at exactly the wrong time of day.

The other half of the strategy is a turnaround time set before you start, out loud, and honored. The mountain will still be there. It has been for a while.

Getting there, and the parking problem

The Longs Peak Ranger Station sits off Highway 7 south of Estes Park, outside the main park corridor, so it does not require the timed-entry reservation the Bear Lake road does. What it does have is a small day-use lot that fills before midnight on summer weekends.

If you arrive at 3:00 AM in July you may be parking on the highway shoulder a mile down the road, which adds two miles of walking to a day that already has plenty. This is the most common way a Longs Peak attempt goes sideways before it starts, and the only fix is arriving absurdly early or going midweek.

One honest note about the numbers. The park publishes the Keyhole Route as about 14.5 miles round trip; the line on the map above measures 13.6. Both are true. Above the Keyhole there is no surveyed trail to measure — the route is a corridor of bullseyes, and every party walks a slightly different and slightly longer line through it than any map can draw.

Where this series goes next

Iconic Day Hikes has now covered Angels Landing, Half Dome, Grinnell Glacier, the Franconia Ridge Loop, Katahdin's Knife Edge, Mount Whitney and Longs Peak — routes whose reputations rest on a single feature: a fin, a set of cables, a knife edge, a wall of switchbacks, a keyhole.

If you want the mountain rather than the day, our full Longs Peak profile covers the naming, John Wesley Powell's 1868 first recorded ascent, the Loft and Keplinger's Couloir, and the Diamond.

Sources

Keep reading

Hero photograph: The Keyhole at first light, 13,150 feet. This notch is where the maintained trail stops and the route begins — the far side is the Ledges, and the drop beyond it is Glacier Gorge. by Rakin23, licensed under CC BY-SA 4.0.

Six Miles In, The Trail Ends