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structures to be found there at the right bank entrance today (Fig. 35). The name Aztec Creek is believed to have been applied to the stream by miners who saw these structures, probably used them as camping shelters, and imagined them to have been the work of Aztecs, who were commonly and fallaciously held in the 1870's and 1880's to have erected the ruined pueblos of the Southwest. Aztec rapids, the fast water of the Colorado caused by the huge boulder delta of Aztec Creek, is occasionally referred to in Glen Canyon mining literature. There are indications that the upper tributaries of Aztec Creek were known to prospectors perhaps in advance of the lower course of the stream. Bridge Canyon, spanned by Rainbow Bridge (Historical site 30), was known as early as about 1884 as Under-the-Arm Canyon, and Cliff Canyon, the second major right hand tributary upstream from the Colorado, as Broken Leg Canyon (Williams 1929). (See Historical site 30). Gregory (1916) uses the name Bridge Canyon to describe the entire watercourse in his work on the Navajo Country. Aztec Creek as the name for the parent stream appears on River Map Sheet F published by the U. S. Geological Survey in 1921 and this usage has been followed since. In that year Bernheimer (1924, 33) employed the name West Cañon to describe the canyon of the main stream but on the 1922 expedition Bernheimer (1924, 96) substituted the name Forbidding Canyon, in use since. However, on the Navajo Mountain quadrangle USGS (1953) it becomes "Forbidden Canyon". Bridge Canyon on the same quadrangle becomes Rainbow Bridge canyon. Rainbow Bridge may be approached by two horse trails. One, the route followed by the cummings-Douglass discovery party in 1909, passes around the northern slopes of Navajo Mountain on about the 5000 ft. contour and reaches Bridge Canyon about two miles above the Bridge. The other passes around the southern slopes of Navajo Mountain and drops from the 6400 contour 2000 ft. into Cliff Canyon. It crosses from there through a narrow defile, known as Redbud Pass, to Bridge Canyon, reaching it about three miles above the Bridge. This was the route opened by the Bernheimer expedition in 1922 (Bernheimer 1923 and 1924) and thereafter the most popular horse trail to the Bridge. Williams (1929) stated that he had been over it in the winter of 1884. Most of the visitors to Rainbow Bridge have been members of boat parties who have walked up Aztec and Bridge creeks from the Colorado River (Fig. 36). Although miners or trappers in Glen Canyon may have reached the Bridge by this route during the gold rush, the first visitors 99Epson Perfection 4870 Photo, 400 dpi, 8 bit, 13,854,720 byte