The Himalaya by the Numbers: A Statistical Analysis - Himalayan ...

Peak
ID
Peak Name Height Region
76 Ascent Analysis
Exp
Cnt
Mbrs
Abv
BC
Avg
Suc Exp
Days
Avg
Smt
Days
Min
Smt
Days
Max
Smt
Days
LEON Leonpo Gang 6979 3 7 52 38.7 32.7 24 40
LHOT Lhotse 8516 2 145 945 37.8 32.6 4 58
LSHR Lhotse Shar 8382 2 30 23 45.9 40.9 31 50
LSIS Langsisa Ri 6412 3 11 65 13.7 10.7 5 21
MAK2 Makalu II 7678 2 43 266 30.6 24.6 12 52
MAKA Makalu 8485 2 178 1273 39.6 34.4 5 65
MANA Manaslu 8163 4 190 1259 32.6 28.1 6 63
MANN Manaslu North 7157 4 9 80 26.8 22.2 8 28
NEPA Nepal Peak 7177 1 5 57 19.0 17.0 17 17
NILN Nilgiri North 7061 5 13 80 26.2 21.6 13 32
NUMB Numbur 6958 2 15 93 20.6 18.3 12 28
NUPT Nuptse 7864 2 32 169 43.2 33.4 20 46
PK29 Peak 29 7871 4 8 87 35.0 32.0 32 32
PUMO Pumori 7165 2 208 1254 18.2 14.6 2 45
PUTH Putha Hiunchuli 7246 6 29 235 18.1 14.3 6 36
RATH Rathong 6682 1 4 60 8.0 6.0 6 6
ROCN Roc Noir 7485 5 8 66 43.0 33.0 19 44
SAIP Saipal 7030 7 11 63 30.0 25.8 19 37
TAWO Tawoche 6495 2 16 74 16.4 12.6 2 21
THAM Thamserku 6618 2 13 55 20.6 18.8 2 33
TILI Tilicho 7134 5 55 428 14.7 10.9 3 23
TUKU Tukuche 6920 6 35 256 13.5 11.7 5 20
YALU Yalung Kang 8505 1 18 174 40.3 34.4 23 54
Geographical Region Codes:
1 = Kangchenjunga-Janak 5 = Annapurna-Damodar-Peri
2 = Khumbu-Rolwaling-Makalu 6 = Dhaulagiri-Mukut
3 = Langtang-Jugal 7 = Kanjiroba-Far West
4 = Manaslu-Ganesh
Table A-36: Average duration and days to first summit for successful expeditions
Oxygen and the 8000ers
Charts A-37a-b show the percentage of ascents without the use of supplementary oxygen
for each of the 8000m peaks for the 1950-1989 and 1990-2006 periods.
The 8000m peaks can be divided into three groups of peaks of similar altitude:
8091-8188 (Annapurna I, Manaslu, Dhaulagiri I, Cho Oyu)
8485-8486 (Makalu, Lhotse, Kangchenjunga)
8850 (Everest)
In general as shown in the following charts, the percentages of ascents without
supplementary oxygen decrease with altitude as would be logically expected.
For members, the percentages of ascents without supplementary oxygen increase in
1990-2006 period over the 1950-1989 period for each peak except Everest and Cho Oyu
(the commercially climbed peaks). For the commercial routes on Everest and Cho Oyu,
the use of supplementary oxygen increases since most commercial clients are more
interested in success than climbing style and route difficulty due to their general lack
of experience and their relative high investment in the expedition in terms of cost and
time. Many of them cannot devote more time to their climbing adventures due to other
commitments in their lives.