Puyallup River. Two forks of this river rise from the glaciers on the western and southwestern slopes of the mountain. The river empties into Puget Sound at Tacoma Harbor. There have been many spellings of the word in early annals. Rev. Myron Eells says the tribe of Indians living on the river called themselves "Puyallupnamish."
Pyramid Park. On the southern slope of the mountain, adjacent to Pyramid Peak. From the park flows a stream called Pyramid Creek, and above the park lies Pyramid Glacier, between South Tahoma and Kautz Glaciers.
Pyramid Peak. On the southwestern slope, overlooking Indian Henrys Hunting Ground. It was named by James L. Mosman, of Yelm, because of its resemblance to a perfect pyramid. The same name has been extended to a small park and glacier to the northeastward of the peak. Elevation, 6,937 feet above sea level.
Rainier. See Mount Rainier.
Rampart Ridge. On the southern slope of the mountain. This ridge is a prominent group of crags rising above Longmire Springs. Elevation, 3,800 feet above sea level. The nearer and higher portion of the ridge is known as The Ramparts. The name is an old one, but who first suggested it has not been ascertained. Elevation of The Ramparts, 4,080 feet above sea level.
Ranger Creek. In the northwestern corner of the Park, flowing into Carbon River near the Ranger Station at the boundary of the Park.
Redstone Peak. In the north-central portion of the Park, between the headwaters of Van Horn Creek and White River.
Reese's Camp. On the south-central slope of the mountain, in Paradise Park. For a number of years John L. Reese has accommodated visitors in a log and canvas hotel with numerous tents for sleeping rooms. The name of his camp has grown so familiar that other names are forgotten. The site of his hotel was once known as Theosophy Ridge. Beginning with 1916, the Rainier National Park Company, a new corporation composed of prominent citizens, will supplant Reese's Camp with a modern hotel and will provide garages, lunch-stations and other conveniences for the tourists. The elevation at Reese's Camp is 5,557 feet above sea level.
Reflection Lakes. On the south-central slope of the mountain. These lakes are visited by all who make the trip to Pinnacle Peak from Paradise Valley. Elevation, 4,861 feet above sea level.
Register Rock. On the rim of the crater, where there is securely fastened in the rocks a record on which all successful climbers by way of the Gibraltar route sign their names. Elevation, 14,161 feet above sea level, or 247 feet below Columbia Crest, the actual summit.