The trail
Lake Isabelle rates moderate, topping out at 10,868 ft over 4.6 mi round trip and 440 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 33°F to 65°F across the elevation band, a 32°F swing the layering below is sized against.
First light comes at 5:46 AM, sunrise at 6:15 AM, sunset at 8:01 PM, and last light at 8:30 PM. That's 13h 46m 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.
The kit, and why it's on the list
The build for a typical summer day on this route: written to the route, not to a particular party.
Non-negotiable · the floor under this route: insulated bottle, daypack, whistle and compass, first-aid kit, and insulation layer.
Weather-driven · for the conditions this route can turn up: rain shell.
Easier from the same trailhead
From the same trailhead, 1 easier route trades the bigger objective for margin:
Long Lake rates easy.
What we can't promise
These numbers are what summer usually does in this elevation band, not a forecast. Your date can run colder, wetter, or windier.
This guide describes a typical day, not a specific party. Pace, margin, and kit shift with the people actually on the trail.
