The trail
Longs Peak rates expert, topping out at 14,259 ft over 14.5 mi round trip and 5,100 ft of climbing.
Conditions and daylight
Everything here is built on the summer climate normals for this elevation band: typical conditions, not a forecast for your date.
On the normals the day runs 20°F to 51°F across the elevation band, a 31°F swing the layering below is sized against.
First light comes at 5:45 AM, sunrise at 6:14 AM, sunset at 8:01 PM, and last light at 8:30 PM. That's 13h 47m of usable light.
Afternoon storms on this route run monsoon-frequent; on the climate normals they build from 1:00 PM onward. That window, not the summit, sets the turnaround math.
Exposure begins around 11,500 ft; above that line there is no fast shelter, so the weather call is made below it.
The committing terrain starts at The Ledges around 13,150 ft. Retreating below it is the low-cost option; retreating from above it is not.
The route, section by section
Trailhead to Goblins Forest climbs from 9,400 ft to 10,100 ft, below-treeline terrain. Here the route leans on the summit pack, headlamp, hydration reservoir, and trekking poles.
Goblins Forest to Chasm Junction climbs from 10,100 ft to 11,540 ft, near-treeline terrain. This is the stretch that asks for the trekking poles.
Chasm Junction to Granite Pass climbs from 11,540 ft to 12,080 ft, above-treeline terrain. From here it's the insulation layer, rain shell, and sun hoodie doing the work.
Granite Pass to the Boulder Field climbs from 12,080 ft to 12,760 ft, above-treeline terrain. Here the route leans on the gaiters and trekking poles.
The Boulder Field to the Keyhole climbs from 12,760 ft to 13,150 ft, above-treeline terrain. This is the stretch that asks for the whistle and compass, and rain shell.
