Most of Lassen Volcanic National Park is forested, with the distribution of conifers affected by elevation.
Lassen Conifer Guide
Lassen National Forest Trees
Red Fir Forest
Scattered throughout the park's forested areas are stands of old growth red fir, the characteristic tree in the red fir forest community. Growing to heights of over 175 feet, with diameters of 30 to 50 inches, these magnificent trees can live more than 300 years. The area surrounding the Kohm Yah-mah-nee Visitor Center, including the Mill Creek trail, is a good example of red fir forest in the park.
Lassen is home to a few species of deciduous trees, including quaking aspen and cottonwood. The suppression of forest fires has led to natural succession replacing aspen with conifers and vegetation. Aspen groves need fire or other disturbance to stimulate sprouting and control conifers which encroach on aspen groves. Aspen groves can be seen from the park highway in the Hat Creek and Devastated areas. Read more about managing aspen in the surrounding Lassen National Forest.