37S 



/. T. PARDEE 



clearly seen to be a continuation of those of Jumbo. From here 

 they may, with many interruptions, be traced to the south along 

 the eastern slopes of the Bitter Root Valley as far as Skalkaho Creek. 

 Again, similar horizontal lines may be seen on the valley's western 

 slopes north of Lo-Lo Fork in situations nearly free from timber. 

 South of Lo-Lo Fork, if they exist, they are obscured by the forest 

 clothing the foothills of the Bitter Root range. Elsewhere, in the 



Fig. 2. — University Mountain, from University Avenue, Missoula. 



northern slopes of the Missoula Valley below the city of Missoula, 

 and of the Jocko Valley near the Flathead agency, similar "trails" 

 have been noted from a distance. Farther down along the main 

 Clark Fork Valley the slopes are steeper and rocky, and to a great 

 extent timbered. Here the "trails," if they exist, have apparently not 

 as yet been seen, but certain phenomena of this region, as will appear 

 later, may have an intimate relation to them. From unpublished 

 observations of Mr. F. C. Calkins in this area it appears that in the 

 valley of Vermilion Creek an extensive gravel flat trenched by the 

 stream is found at 4,000 feet (aneroid) elevation, and that similar 



