GEOLOGICAL SURVEY OF THE TERRITORIES. 



To build a road through this caiion, on this side of the river, will be 

 expensive. The other side, here the south side, of the river appears 

 much easier, and, if the Middle Caiion can be passed on that side of the 

 river, a route on that side, throughout the whole distance, is to be re- 

 commended. The road should then cross the Madison to the north 

 side, in the Upper Canon, two or three miles below the mouth of Gib- 

 bon's Fork. There remains on this route the uj)per part of the canon 

 to be passed, which, as stated above, presents some difficulties. 



LISTS OF ELEVATIONS AND DISTANCES ON ROUTES TO THE YELLOW- 

 STONE NATIONAL PARK. 



Route from Bozeman to Yellowstone LaJce, hy ivay of Yellowstone Biver. 



Miles. Elevation. 



Bozeman 



Nearly level, with smooth grades to — 



Fort Ellis , 



Divide crossing to Spring Creek, (steep hill on each side) . . 

 Spring Creek 



Steep descent, then vmiform slope up to — 



Camp 2, on Spring Creek, near head 



Divide between Spring and Trail Creeks, between Gallatin 



and Yellowstone , 



Uniform slope to — 



Trail Creek, at crossing 



Long rolling hills to— 



Divide between Trail and Eight-Mile Creeks 



Smooth to — 



Camp 3, on Eight-Mile Creek, near Yellowstone 



Camp 4, at Butler's Ranch, on Yellowstone 



In level river bottom to — 



Camp 5, at mouth of Canon Creek . 

 Second Canon of the Yellowstone River ; 

 Smooth to — 



Uniform slope to — 



Head of Second Caiion , 



Camp 6, near Devil's Slide 



Grade nearly uniform in river bottom to 



Bridge over Gardner's River, near its mouth 



Level to , 



Very heavy grades to , 



Level to 



Grade nearly uniform to — 



Camp 8, on Black-Tail Deer Creek 



Grade very irregular, on rolling plateau, to 



Grade somewhat irregular to — 



Camp 9, in Cache Valley, near mouth of East Fork 

 Nearly uniform grade to 



3.3 



6.7 

 7.3 



8.0 



12.3 

 15.7 

 22.5 



28.5 



30.2 

 39.2 

 44.8 

 45.1 

 45.3 



49.8 



51.8 

 52.1 

 52.7 

 54.7 

 55.3 



57.9 

 59.2 

 59.3 

 59.9 

 64.6 

 67.9 

 68.7 

 70.4 

 7L0 

 71.2 

 7L9 



74.2 

 76.2 



81.7 



84.0 

 86.6 



87.5 



