Lassen Peak Beta & Conditions
See how Lassen Peak is skiing and what to expect for your trip based on real reports from this season and similar seasons.
Recent & Matched Reports
I made a simple tool to guesstimate late-season conditions using past trip reports
**TLDR**: I made a tool to help guess what late-season conditions will be like by looking at trip reports from similar times in the past The tool shows relevant trip reports that are close to your date of interest (duh) as well as “equivalent” past dates. What are equivalent past dates? Dates in previous snow years that likely had similar snow quality to your date of interest. We determine equivalent past dates by analyzing current and historical SNOTEL snow water equivalent (SWE) timeseries, looking at both how much snow there is and how fast it’s melting. Trip reports from these periods can give a rough idea of what to expect. Try it out here and let me know what you think:[ https://www.snowsignals.com/mountains/mount-shasta/beta](https://www.snowsignals.com/mountains/mount-shasta/beta) **FAQ** Q: Is this perfect? A: No, but I think it’s at least a little helpful. Q: Why match SWE curves? A: Date comparisons year-on-year are obviously not useful; mother nature’s not that consistent. SWE curves let us compare snow depth and melt rate, which can approximate late-season snow quality and coverage. Q: Where are the trip reports from? A: Ski/mountaineering-related subreddits Q: Can you add other observation sources? A: Sure, let me know what ideas you have. Q: Why didn’t you add avalanche center observations? A: Unfortunately, a lot of avalanche centers don’t provide observations prior to 2022 due to technical issues on their end. Q: What mountains do you support? A: Shasta and Lassen (my home base, California) to start Q: Can you add my mountain? A: Yes, just let me know which ones
I made a simple tool to guesstimate late-season conditions using past trip reports
**TLDR**: I made a tool to help guess what late-season conditions will be like by looking at trip reports from similar times in the past The tool shows relevant trip reports that are close to your date of interest (duh) as well as “equivalent” past dates. What are equivalent past dates? Dates in previous snow years that likely had similar snow quality to your date of interest. We determine equivalent past dates by analyzing current and historical SNOTEL snow water equivalent (SWE) timeseries, looking at both how much snow there is and how fast it’s melting. Trip reports from these periods can give a rough idea of what to expect. Try it out here and let me know what you think:[ https://www.snowsignals.com/mountains/mount-shasta/beta](https://www.snowsignals.com/mountains/mount-shasta/beta) **FAQ** Q: Is this perfect? A: No, but I think it’s at least a little helpful. Q: Why match SWE curves? A: Date comparisons year-on-year are obviously not useful; mother nature’s not that consistent. SWE curves let us compare snow depth and melt rate, which can approximate late-season snow quality and coverage. Q: Where are the trip reports from? A: Ski/mountaineering-related subreddits Q: Can you add other observation sources? A: Sure, let me know what ideas you have. Q: Why didn’t you add avalanche center observations? A: Unfortunately, a lot of avalanche centers don’t provide observations prior to 2022 due to technical issues on their end. Q: What mountains do you support? A: Shasta and Lassen (my home base, California) to start Q: Can you add my mountain? A: Yes, just let me know which ones
Mt. Shasta Trip Report 6/22 (and thank you!)
I recently [posted](https://www.reddit.com/r/Mountaineering/comments/1l8i5k3/advice_for_shasta_ag_in_two_weeks/) here asking for advice on Shasta! I wanted to update on how it went! # Mt. Shasta Trip
Lassen Peak / Mt Diller?
We were looking at touring Lassen this weekend. Information looks thin on the ground online, and we had a few questions- 1) Is the road to Kohm Yah-mah-nee Visitor Center going to be open? 2) Ar
How do we match seasons? (Show snowpack data)See the SNOTEL analysis that finds similar snow years
We analyze Snow Water Equivalent (SWE) patterns from SNOTEL stations around Lassen Peak to find years with similar snowpack development.
Your June 28, 2025 Lassen Peak Trip Matches These Historical Dates
These dates had similar snowpack patterns to your selected date's conditions.
SNOTEL Stations Used
Lassen Peak Snowpack Analysis
This chart shows Lassen Peak's snowpack patterns we analyzed. The thick red line is this year's Lassen Peak snowpack development. The colored lines show historical years with similar Lassen Peak patterns — that's how we know what to expect.
Water Year View: Shows snowpack progression from October through September. Compare seasonal timing between years.
💡 How to read this: When lines follow similar curves, it means Lassen Peak's accumulated and melted at similar rates. Similar melt patterns typically lead to similar Lassen Peak climbing and skiing conditions.
Ready for your Lassen Peak adventure?
Now that you've seen how this season compares, get the detailed forecast and route info for your planned dates. We'll help you nail the timing and prep for your Lassen Peak trip.
FAQ: Using Trip Reports to Plan
How do you find relevant trip reports for Lassen Peak?
We analyze Snow Water Equivalent patterns from SNOTEL stations around Lassen Peak to find years with similar snowpack development. Then we surface trip reports and observations from those matched time periods, plus recent reports from the current season.
Can I trust trip reports from different years?
Similar snowpack patterns often produce similar skiing and climbing experiences on Lassen Peak. However, always combine historical observations with current forecasts, avalanche conditions, and recent reports for the most accurate picture.
How recent are these Lassen Peak trip reports?
We show both recent reports (last 3 weeks) and matched historical reports from similar seasons. Each report is tagged so you know whether it's from this year or a comparable past season.
What if I don't see many trip reports for Lassen Peak?
Trip report availability varies by mountain popularity and season timing. We're constantly expanding our sources and improving our matching algorithms to surface more relevant observations.