Cho Oyu | 1997 NW side

A New Zealand expedition to Cho Oyu in 1997 via NW side, led by Guy Cotter. Summit reached on 28th September 1997. 11 members recorded.

Expedition Details

Field	Value
ID	2415
Imported	2026-03-06 18:04:49.359634
Expedition ID	CHOY97315
Peak ID	CHOY
Year	1997
Season	3
Host Country	2
Route 1	NW side
Route 2	-
Route 3	-
Route 4	-
Nationality	New Zealand
Leaders	Guy Cotter
Sponsor	Adventure Consultants Cho Oyu Expedition 1997
Success 1	True
Success 2	False
Success 3	False
Success 4	False
Ascent 1	269
Ascent 2	-
Ascent 3	-
Ascent 4	-
Claimed	False
Disputed	False
Countries	Australia, China, UK, USA
Approach	-
Basecamp Date	1997-09-10
Summit Date	1997-09-28
Summit Time	0845
Summit Days	18
Total Days	23
Termination Date	1997-10-03
Termination Reason	1
Termination Notes	-
High Point (m)	8188
Traverse	False
Ski	False
Paraglide	False
Camps	3
Fixed Rope (m)	0
Total Members	9
Summit Members	5
Member Deaths	0
Total Hired	3
Summit Hired	2
Hired Deaths	0
No Hired	False
O2 Used	True
O2 None	False
O2 Climb	True
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Taken	False
O2 Unknown	False
Other Summits	-
Campsites	BC(10/09),ABC(13/09,5700m),C1(16/09,6400m),C2(20/09,7100m),C3(27/09,7500m),Smt(28/09)
Route Notes	Climb went exactly according to plan except one member got a headache and delayed ascent by one day. Two members left on 19th because one admitted he had bitten off more than he could chew and the other had number of minor ailments and lost motivation. Cotter 1st guide to guide successful 8000m teams in 3 successive seasons. 16 Sept - C1 occupied by Cotter, Hiddleston, Collins, Arnett, Wille, Kerr, Santiago and Nam 20 Sept - C2 occupied by Cotter, Hiddleston, Kerr, Nam 27 Sept - C3 occupied by Cotter, Hiddleston, Collins, Kerr, Nam and (Sherpa not named)
Accidents	Arnett altitude sickness
Achievement	1st Hong Kong Chinese summiter
Agency	Wilderness Experience
Commercial Route	True
Standard Route	True
Primary Route	False
Primary Member	False
Primary Reference	-
Primary ID	-
Checksum	2456452
Year	1997
Summit Success	True
O2 Summary	Used
Route (lowercase)	nw side

Members

Field	Value
ID	6127
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY97315
Member ID	02
Peak ID	CHOY
Year	1997
Season	3
First Name	David Joseph (Dave)
Last Name	Arnett
Sex	M
Age	0
Birth Date	-
Year of Birth	1951
Calculated Age	46
Citizenship	USA
Status	Climber
Residence	Northville, Michigan
Occupation	Office manager
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	False
Personal High Point (m)	6400
Summit Date 1	-
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	0
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	False
O2 None	True
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	-
Summit Bid	1
Summit Term	6
HCN	0
Checksum	2431801
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	david joseph (dave) arnett
Year of Birth	1951
Year	1997
Age at Expedition	46
Role	Member

Field	Value
ID	6128
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY97315
Member ID	03
Peak ID	CHOY
Year	1997
Season	3
First Name	Arthur
Last Name	Collins
Sex	M
Age	0
Birth Date	-
Year of Birth	1958
Calculated Age	38
Citizenship	New Zealand
Status	Exp Doctor
Residence	Christchurch, New Zealand
Occupation	Physician & alpine guide
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	True
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	True
Personal High Point (m)	8188
Summit Date 1	1997-09-28
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	1
Route 2	0
Route 3	0
Ascent 1	269
Ascent 2	0
Ascent 3	0
O2 Used	True
O2 None	False
O2 Climb	True
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	ABC only
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	-
Summit Bid	5
Summit Term	1
HCN	0
Checksum	2434405
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	arthur collins
Year of Birth	1958
Year	1997
Age at Expedition	39
Role	Member

Field	Value
ID	6129
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY97315
Member ID	04
Peak ID	CHOY
Year	1997
Season	3
First Name	Joseph R.
Last Name	Connell
Sex	M
Age	0
Birth Date	-
Year of Birth	1949
Calculated Age	48
Citizenship	USA
Status	Climber
Residence	Boulder, Colorado
Occupation	Pilot
Leader	False
Deputy	False
Basecamp Only	True
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	False
Personal High Point (m)	0
Summit Date 1	-
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	0
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	False
O2 None	True
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	-
Summit Bid	1
Summit Term	19
HCN	0
Checksum	2430964
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	joseph r. connell
Year of Birth	1949
Year	1997
Age at Expedition	48
Role	BC Only

Field	Value
ID	6130
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY97315
Member ID	01
Peak ID	CHOY
Year	1997
Season	3
First Name	Edmund Guy
Last Name	Cotter
Sex	M
Age	0
Birth Date	-
Year of Birth	1962
Calculated Age	35
Citizenship	New Zealand
Status	Leader
Residence	Wanaka, New Zealand
Occupation	Alpine guide
Leader	True
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	True
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	True
Personal High Point (m)	8188
Summit Date 1	1997-09-28
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	1
Route 2	0
Route 3	0
Ascent 1	269
Ascent 2	0
Ascent 3	0
O2 Used	True
O2 None	False
O2 Climb	True
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	-
Summit Bid	5
Summit Term	1
HCN	0
Checksum	2435796
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	edmund guy cotter
Year of Birth	1962
Year	1997
Age at Expedition	35
Role	Leader

Field	Value
ID	6131
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY97315
Member ID	05
Peak ID	CHOY
Year	1997
Season	3
First Name	David John
Last Name	Hiddleston
Sex	M
Age	0
Birth Date	-
Year of Birth	1969
Calculated Age	28
Citizenship	New Zealand
Status	Climber
Residence	Wanaka, New Zealand
Occupation	Alpine guide
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	True
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	True
Personal High Point (m)	8188
Summit Date 1	1997-09-28
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	1
Route 2	0
Route 3	0
Ascent 1	269
Ascent 2	0
Ascent 3	0
O2 Used	True
O2 None	False
O2 Climb	True
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	(1969-2002) Died 31 December 2002 on Mt. Tasman in New Zealand from avalanche
Summit Bid	5
Summit Term	1
HCN	0
Checksum	2438152
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	david john hiddleston
Year of Birth	1969
Year	1997
Age at Expedition	28
Role	Member

Field	Value
ID	6132
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY97315
Member ID	06
Peak ID	CHOY
Year	1997
Season	3
First Name	Keith Graham
Last Name	Kerr
Sex	M
Age	0
Birth Date	-
Year of Birth	1952
Calculated Age	45
Citizenship	UK
Status	Climber
Residence	Hong Kong
Occupation	Business executive
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	True
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	True
Personal High Point (m)	8188
Summit Date 1	1997-09-28
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	1
Route 2	0
Route 3	0
Ascent 1	269
Ascent 2	0
Ascent 3	0
O2 Used	True
O2 None	False
O2 Climb	True
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	-
Summit Bid	5
Summit Term	1
HCN	0
Checksum	2432048
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	keith graham kerr
Year of Birth	1952
Year	1997
Age at Expedition	45
Role	Member

Field	Value
ID	6133
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY97315
Member ID	07
Peak ID	CHOY
Year	1997
Season	3
First Name	Yick-Nam
Last Name	Leung
Sex	M
Age	0
Birth Date	-
Year of Birth	1962
Calculated Age	35
Citizenship	China
Status	Climber
Residence	Hong Kong
Occupation	Reporter
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	True
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	True
Personal High Point (m)	8188
Summit Date 1	1997-09-28
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	1
Route 2	0
Route 3	0
Ascent 1	269
Ascent 2	0
Ascent 3	0
O2 Used	True
O2 None	False
O2 Climb	True
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	-
Summit Bid	5
Summit Term	1
HCN	0
Checksum	2435661
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	yick-nam leung
Year of Birth	1962
Year	1997
Age at Expedition	35
Role	Member

Field	Value
ID	6134
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY97315
Member ID	08
Peak ID	CHOY
Year	1997
Season	3
First Name	Marilyn
Last Name	Santiago
Sex	F
Age	0
Birth Date	-
Year of Birth	1966
Calculated Age	31
Citizenship	USA
Status	Climber
Residence	Manila, Philippines
Occupation	Business executive
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	False
Personal High Point (m)	6400
Summit Date 1	-
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	0
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	False
O2 None	True
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	-
Summit Bid	1
Summit Term	19
HCN	0
Checksum	2437127
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	marilyn santiago
Year of Birth	1966
Year	1997
Age at Expedition	31
Role	Member

Field	Value
ID	6135
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY97315
Member ID	09
Peak ID	CHOY
Year	1997
Season	3
First Name	Michael
Last Name	Wille
Sex	M
Age	0
Birth Date	-
Year of Birth	1943
Calculated Age	54
Citizenship	Australia
Status	Climber
Residence	Chelmen, QLD, Australia
Occupation	Managing director of pharmaceutical company
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	False
Personal High Point (m)	6400
Summit Date 1	-
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	0
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	False
O2 None	True
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	C1 only
Necrology	-
Summit Bid	1
Summit Term	19
HCN	0
Checksum	2428685
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	michael wille
Year of Birth	1943
Year	1997
Age at Expedition	54
Role	Member

Field	Value
ID	6136
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY97315
Member ID	10
Peak ID	CHOY
Year	1997
Season	3
First Name	Chuldim (Chuldim Dorje)
Last Name	Sherpa
Sex	M
Age	0
Birth Date	-
Year of Birth	1963
Calculated Age	33
Citizenship	Nepal
Status	H-A Worker
Residence	Khumjung, Khumbu
Occupation	-
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	True
Sherpa	True
Tibetan	False
Summit Success	True
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	True
Personal High Point (m)	8188
Summit Date 1	1997-09-28
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	1
Route 2	0
Route 3	0
Ascent 1	269
Ascent 2	0
Ascent 3	0
O2 Used	False
O2 None	True
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	2nd ascent of Cho Oyu
Necrology	-
Summit Bid	5
Summit Term	1
HCN	0
Checksum	2436251
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	chuldim (chuldim dorje) sherpa
Year of Birth	1963
Year	1997
Age at Expedition	34
Role	Hired

Field	Value
ID	6137
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY97315
Member ID	11
Peak ID	CHOY
Year	1997
Season	3
First Name	Chuldim Dorje (Ang Dorje)
Last Name	Sherpa
Sex	M
Age	0
Birth Date	-
Year of Birth	1964
Calculated Age	32
Citizenship	Nepal
Status	H-A Worker
Residence	Pangboche, Khumbu
Occupation	-
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	True
Sherpa	True
Tibetan	False
Summit Success	True
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	True
Personal High Point (m)	8188
Summit Date 1	1997-09-28
Summit Date 2	-
Summit Date 3	-
Summit Time 1	0845
Summit Time 2	-
Summit Time 3	-
Route 1	1
Route 2	0
Route 3	0
Ascent 1	269
Ascent 2	0
Ascent 3	0
O2 Used	False
O2 None	True
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	2nd ascent of Cho Oyu; brother of Lobsang Temba
Necrology	-
Summit Bid	5
Summit Term	1
HCN	0
Checksum	2436615
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	chuldim dorje (ang dorje) sherpa
Year of Birth	1964
Year	1997
Age at Expedition	33
Role	Hired

11 recorded members.

Name	Sex	Year of Birth	Citizenship	Status	Residence	Occupation
David Joseph (Dave) Arnett	M	1951	USA	Climber	Northville, Michigan	Office manager	Details Other expeditions
Arthur Collins	M	1958	New Zealand	Exp Doctor	Christchurch, New Zealand	Physician & alpine guide	Details Other expeditions
Joseph R. Connell	M	1949	USA	Climber	Boulder, Colorado	Pilot	Details Other expeditions
Edmund Guy Cotter	M	1962	New Zealand	Leader	Wanaka, New Zealand	Alpine guide	Details Other expeditions
David John Hiddleston	M	1969	New Zealand	Climber	Wanaka, New Zealand	Alpine guide	Details Other expeditions
Keith Graham Kerr	M	1952	UK	Climber	Hong Kong	Business executive	Details Other expeditions
Yick-Nam Leung	M	1962	China	Climber	Hong Kong	Reporter	Details Other expeditions
Marilyn Santiago	F	1966	USA	Climber	Manila, Philippines	Business executive	Details Other expeditions
Michael Wille	M	1943	Australia	Climber	Chelmen, QLD, Australia	Managing director of pharmaceutical company	Details Other expeditions
Chuldim (Chuldim Dorje) Sherpa	M	1963	Nepal	H-A Worker	Khumjung, Khumbu	-	Details Other expeditions
Chuldim Dorje (Ang Dorje) Sherpa	M	1964	Nepal	H-A Worker	Pangboche, Khumbu	-	Details Other expeditions

References

0 recorded references.