_Phlox Creek_--Q : 13--1885--U. S. G. S.--Characteristic. _Plateau Creek_--C : 12--1885--U. S. G. S.--Characteristic. _Polecat Creek_--S : 6--1885--U. S. G. S.--Characteristic. _Quartz Creek_--E : 10--1885--U. S. G. S.--Characteristic. _Rabbit Creek_--K : 4--1885--U. S. G. S.--Characteristic. _Raven Creek_--J: 12--1885--U. S. G. S.--Characteristic. _Red Creek_--Q: 8--1885--U. S. G. S.--Characteristic. _Rescue Creek_--C: 7--1878--U. S. G. S.--Where Everts was not found. (See "Mt. Everts.") _Rocky Creek_--O: 12--1885--U. S. G. S.--Characteristic. _Rose Creek_--D: 12--1885--U. S. G. S.--Characteristic. _Sedge Creek_--K: 11--1885--U. S. G. S.--Characteristic. _Senecio Creek_--S: 13--1885--U. S. G. S.--Characteristic. _Sentinel Creek_--J: 4--1872--U. S. G. S.--"The two central ones [geyser mounds] are the highest, and appear so much as if they were guarding the Upper Valley, that this stream was called Sentinel Branch." Bradley. _Shallow Creek_--F: 11--1895--U. S. G. S.--Characteristic. _Sickle Creek_--Q: 10--1885--U. S. G. S.--Characteristic. _Slough Creek_--D: 10--1867--See "Crevice Creek." _Snake River_ (6,808)--W: 8--1805--Lewis and Clark--From the Snake or Shoshone Indians, who dwelt in its valley. _Soda Butte Creek_--E: 12--Probably named by miners prior to 1870. From an extinct geyser or hot spring cone near the mouth of the stream. _Solfatara Creek_--G: 6--1885--U. S. G. S.--Characteristic. _Solution Creek_--M: 8--1885--U. S. G. S.--The outlet of Riddle Lake. _Sour Creek_--H: 9--1871--Barlow--Characteristic. _Spirea Creek_--R: 6--1885--U. S. G. S.--Characteristic. _Spring Creek_--M: 5--1885--U. S. G. S.--Characteristic. _Spruce Creek_--J: 6--1885--U. S. G. S.--Characteristic. _Squirrel Creek_--N: 5--1878--U. S. G. S.--Characteristic. _Stellaria Creek_--C: 3--1885--U. S. G. S.--Characteristic. _Stinkingwater River_--L: 16--1807--John Colter--From an offensive hot spring near the junction of the principal forks of the stream. A most interesting fact, to which attention was first publicly called by Prof. Arnold Hague, is the occurrence on the map, which Lewis and Clark sent to President Jefferson in the spring of 1805, of the name "Stinking Cabin Creek," very nearly in the locality of the river Stinkingwater. Prof. Hague, who published an interesting paper concerning this map in _Science_ for November 4, 1877, thinks that possibly some trapper had penetrated this region even before 1804. But with Lewis and Clark's repeated statements that no white man had reached the Yellowstone prior to 1805, it seems more likely that the name was derived from the Indians. _Straight Creek_--E: 5--1885--U. S. G. S.--Characteristic. _Sulphur Creek_--G: 9--1878--U. S. G. S.--Characteristic.--Locally this name is applied to a stream which flows from the hot springs at the base of Sulphur Mountain. _Surface Creek_--G: 9--1885--U. S. G. S.--Characteristic.