Below is a list of downloadable maps in pdf (Adobe Portable Document Format). To view these maps, you will need Acrobat Reader or the Acrobat plug-in for your browser. Note that some map files are large and may take some time to download.
Click here to download a map showing slope characteristic for the southwest and Lassen Peak areas of Lassen Volcanic National Park (Attention: This map does not show current conditions at
Did You Know?
The 29 mile Main Park Road was constructed between 1925 and 1931, just 10 years after Lassen Peak erupted. Near Lassen Peak the road reaches 8512 feet, making it the highest road in the Cascade Mountains. It is not unusual for 40 feet of snow to accumulate on the road near Lake Helen.