The sugar pine, whose northern limit is near the center of the reserve, extends also to the eastern slope, near Crater Lake. It is a large tree of the first economic value, but its reproduction in this locality is not strong. Other trees are the Sitka spruce and the incense cedar, neither of which is common. Fire has done less damage on the western than on the eastern slope. Still, its ravages have been exceedingly severe, and it is of the first importance that they should be checked.
Reference is made to the description of a fire in dense forest on the eastern slope.
When such fires are assisted by violent winds they travel with great rapidity, and while the wind continues efforts to subdue them are ineffectual. As has already been mentioned in a previous part of this report, the object of organization against fire should be to reach the scene of a conflagration before it has had time to gather strength. Trails, therefore, are of the first importance. Water for irrigation is of comparatively little importance except in the eastern part of this reserve. Floods are dangerous, and the protection of the mountain slopes is required on their account.