The Spell of the Rockies

by Enos A. Mills

During the last fifty years the majority of the Western forest fires have been set by unextinguished camp-fires, while the majority of the others were the result of some human carelessness. The number of preventable forest fires is but little less than the total number. True, lightning does occasionally set a forest on fire; I have personal knowledge of a number of such fires, but I have never known lightning to set fire to a green tree. Remove the tall dead trees from forests, and the lightning will lose the greater part of its kindling.

In forest protection, the rivers, ridge-tops, rocky gulches, rock-fields, lake-shores, meadows, and other natural fire-resisting boundary lines between forests are beginning to be used and can be more fully utilized for fire-lines, fire-fighting, and fire-defying places. These natural fire-barriers may be connected by barren cleared lanes through the forest, so that a fire-break will isolate or run entirely around any natural division of forest. With such a barrier a fire could be kept within a given section or shut out of it.

In order to fight fire in a forest it must be made accessible by means of roads and trails; these should run on or alongside the fire-barrier so as to facilitate the movements of fire patrols or fire-fighters. There should be with every forest an organized force of men who are eternally vigilant to prevent or to fight forest fires. Fires should be fought while young and small, before they are beyond control.

There should be crows'-nests on commanding crags and in each of these should be a lookout to watch constantly for starting fires or suspicious smoke in the surrounding sea of forest. The lookout should have telephonic connection with rangers down the slopes. In our national forests incidents like the following are beginning to occur: Upon a summit is stationed a ranger who has two hundred thousand acres of forest to patrol with his eyes. One morning a smudgy spot appears upon the purple forest sea about fifteen miles to the northwest. The lookout gazes for a moment through his glass and, although not certain as to what it is, decides to get the distance with the range-finder. At that instant, however, the wind acts upon the smudge and shows that a fire exists and reveals its position. A ranger, through a telephone at the forks of the trail below, hears from the heights, "Small fire one mile south of Mirror Lake, between Spruce Fork and Bear Pass Trail, close to O'Brien's Spring." In less than an hour a ranger leaps from his panting pony and with shovel and axe hastily digs a narrow trench through the vegetable mould in a circle around the fire. Then a few shovelfuls of sand go upon the liveliest blaze and the fire is under control. As soon as there lives a good, sympathetic public sentiment concerning the forest, it will be comparatively easy to prevent most forest fires from starting and to extinguish those that do start.

With the snow over, I started for the scene of the first fire, and on the way noticed how much more rapidly the snow melted in the open than in a forest. The autumn sun was warm, and at the end of the first day most of the snow in open or fireswept places was gone, though on the forest floor the slushy, compacted snow still retained the greater portion of its original moisture. On the flame-cleared slopes there was heavy erosion; the fire had destroyed the root-anchorage of the surface and consumed the trash that would ordinarily have absorbed and delayed the water running off; but this, unchecked, had carried off with it tons of earthy material. One slope on the first burn suffered heavily; a part of this day's "wash" was deposited in a beaver pond, of half an acre, which was filled to the depth of three feet. The beavers, finding their subterranean exits filled with wash, had escaped by tearing a hole in the top of their house.

Leaving this place, I walked across the range to look at a fire that was burning beyond the bounds of the snowfall. It was in a heavily forested cove and was rapidly undoing the constructive work of centuries. This cove was a horseshoe-shaped one and apparently would hold the fire within its rocky ridges. While following along one of these ridges, I came to a narrow, tree-dotted pass, the only break in the confining rocky barrier. As I looked at the fire down in the cove, it was plain that with a high wind the fire would storm this pass and break into a heavily forested alpine realm beyond. In one day two men with axes could have made this pass impregnable to the assaults of any fire, no matter how swift the wind ally; but men were not then defending our forests and an ill wind was blowing.

Many factors help to determine the speed of these fires, and a number of observations showed that under average conditions a fire burned down a slope at about one mile an hour; on the level it traveled from two to eight miles an hour, while up a slope it made from eight to twelve. For short distances fires occasionally roared along at a speed of fifty or sixty miles an hour and made a terrible gale of flames.

I hurried up into the alpine realm and after half an hour scaled a promontory and looked back to the pass. A great cloud of smoke was streaming up just beyond and after a minute tattered sheets of flame were shooting high above it. Presently a tornado of smoke and flame surged into the pass and for some seconds nothing could be seen. As this cleared, a succession of tongues and sheets of flame tried to reach over into the forest on the other side of the pass, but finally gave it up. Just as I was beginning to feel that the forest around me was safe, a smoke-column arose among the trees by the pass. Probably during the first assault of the flames a fiery dart had been hurled across the pass.

Up the shallow forested valley below me came the flames, an inverted Niagara of red and yellow, with flying spray of black. It sent forward a succession of short-lived whirlwinds that went to pieces explosively, hurling sparks and blazing bark far and high. During one of its wilder displays the fire rolled forward, an enormous horizontal whirl of flame, and then, with thunder and roar, the molten flames swept upward into a wall of fire; this tore to pieces, collapsed, and fell forward in fiery disappearing clouds. With amazing quickness the splendid hanging garden on the terraced heights was crushed and blackened. By my promontory went this magnificent zigzag surging front of flame, blowing the heavens full of sparks and smoke and flinging enormous fiery rockets. Swift and slow, loud and low, swelling and vanishing, it sang its eloquent death song.

A heavy stratum of tarlike smoke formed above the fire as it toned down. Presently this black stratum was uplifted near the centre and then pierced with a stupendous geyser of yellow flame, which reddened as it fused and tore through the tarry smoke and then gushed astonishingly high above.