Lassen Peak Forecast & Snow Conditions
Weather, routes, and today's snow conditions forecast
Lassen Peak delivers accessible volcano skiing deep into spring, with mellow ridges, steeper chutes, and wide-open bowls. Expect shifting snow conditions and limited services.
Today's Snow Conditions
See today's snow conditions, freeze/thaw, corn window, and live weather for Lassen Peak. Preview the forecast and get a snapshot of current skiability.
Weather Now
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Hourly Forecast & Snow Surface Outlook
View detailed forecastWind, temp, sun exposure, and cloud cover — everything that shapes snow quality in the mountains. Use this to time your objective for firm climbs and soft, carvable descents.
Top Ski & Climbing Routes
Explore route-specific snow timing for the most popular lines on Lassen Peak. We show you when each line will ski best based on aspect, elevation, and today's weather.
Lassen - Devastated Area
The standard spring ascent of Lassen Peak, starting from the Devastated Area trailhead. A mellow approach leads to steeper upper slopes, with stunning views of the Chaos Jumbles below. Best skied before noon to catch corn on the summit cone.
Route Stats
Corn Snow Timing & Surface Window
Prime Skiing Window
Today: 6:00 AM - 8:00 AM
Based on freeze/thaw cycles, weather, and aspect. Aim for the "prime skiing window" for the best corn snow and safe climbing.
🗺️ Route Overview
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Surface conditions for 6/27/2025
View in App →Frequently Asked Questions
What is the "corn window"?
The time of day when the snow softens from firm to smooth and carvable. Too early and it's icy, too late and it's slop. We model this window based on sun, wind, and overnight freeze.
Is this for mountaineering too?
Yes. SnowSignals helps you hit firm conditions for climbing and safe corn for skiing down. Whether you're skiing or booting, good timing matters.
How accurate is the forecast?
We combine NWS forecasts with a terrain-based energy model to estimate snow surface changes hour by hour. Still, always verify with on-the-ground conditions.
When is the best time to ski Lassen Peak?
Most lines on Lassen Peak are in from late march through mid-june in average snow years, depending on snow year. Peak conditions typically occur when corn snow develops.
What are the current weather conditions on Lassen Peak?
Our page provides real-time weather forecasts and surface condition analysis for Lassen Peak, updated multiple times daily. Check the weather forecast section above for detailed conditions.
How do I access Lassen Peak for skiing?
Access information including parking details, road conditions, and trailhead locations are provided in the Mountain Info section. Road conditions can change rapidly, so always check current conditions before heading out.
What should I know about avalanche conditions on Lassen Peak?
Always check current avalanche conditions before skiing Lassen Peak. We provide links to local avalanche centers in the Mountain Info section. Proper avalanche education, gear, and current condition awareness are essential for backcountry skiing safety.
What routes are recommended for Lassen Peak?
Our Top Routes section highlights the most frequently skied lines on Lassen Peak, including difficulty ratings, elevation profiles, and optimal timing windows. Each route includes detailed information about access and conditions.
Mountain Info
🗓️ Ski Season
Late March through mid-June in average snow years
🚗 Parking & Access
Main access is from the Devastated Area trailhead (~6,400 ft) on the north side. Restrooms are usually open when road access is available. No overnight facilities.
🛣️ Road Conditions
Highway 89 is plowed to the Devastated Area trailhead in spring, typically opening in April or May. Check road status before departure. Early season travel may require skinning from lower elevations.
Plan Your Ascent and Descent with Confidence
Use SnowSignals to dial in your trip — from morning timing to terrain selection — and hit your line when the snow is at its best.