Surprise Creek—P: 9—1885—U. S. G. S.—Its course, as made known by recent explorations, was surprisingly different from that which earlier explorations had indicated.

Tangled Creek—J: 4—1885—U. S. G. S.—Characteristic.—A hot water stream which flows in numberless interlaced channels.

Thistle Creek—J: 10—1885—U. S. G. S.—Characteristic.

Thoroughfare Creek—R: 13—1885—U. S. G. S.—Its valley forms part of a very practicable route across the Yellowstone Range.

Timothy Creek—G: 13—1885—U. S. G. S.—Characteristic.

Tower Creek—D: 10—1870—Washburn Party—From “Tower Falls,” which see.

Trail Creek—O: 12—1873—Jones—From an elk trail along it.

Trappers' Creek—P: 13—1885—U. S. G. S.—A great beaver resort.

Trout Greek—I: 9—1885—U. S. G. S.—Characteristic.

Violet Creek—I: 8—1872—U. S. G. S.—Characteristic.—“We named the small stream Violet Creek, from the profusion of violets growing upon its banks.” Peale.