Cho Oyu | 2004 NW side

A USA expedition to Cho Oyu in 2004 via NW side, led by Mike Hamill. Summit reached on 26th September 2004. 9 members recorded.

Expedition Details

Field	Value
ID	4702
Imported	2026-03-06 18:04:49.359634
Expedition ID	CHOY04338
Peak ID	CHOY
Year	2004
Season	3
Host Country	2
Route 1	NW side
Route 2	-
Route 3	-
Route 4	-
Nationality	USA
Leaders	Mike Hamill
Sponsor	International Mountain Guides (IMG) Cho Oyu Expedition
Success 1	True
Success 2	False
Success 3	False
Success 4	False
Ascent 1	-
Ascent 2	-
Ascent 3	-
Ascent 4	-
Claimed	False
Disputed	False
Countries	-
Approach	-
Basecamp Date	2004-09-02
Summit Date	2004-09-26
Summit Time	0545
Summit Days	24
Total Days	27
Termination Date	2004-09-29
Termination Reason	1
Termination Notes	-
High Point (m)	8188
Traverse	False
Ski	False
Paraglide	False
Camps	3
Fixed Rope (m)	100
Total Members	5
Summit Members	3
Member Deaths	0
Total Hired	10
Summit Hired	4
Hired Deaths	0
No Hired	False
O2 Used	True
O2 None	False
O2 Climb	True
O2 Descent	True
O2 Sleep	True
O2 Medical	True
O2 Taken	False
O2 Unknown	False
Other Summits	-
Campsites	BC(02/09),ABC(06/09,5630m),C1(11/09,6400m),C2(17/09,7000m),C3(25/09,7460m),Smt(26/09)
Route Notes	Summit team left C3; on top at 6:15 am NST Rice and Dawa Nuru; at 5:45 am, Dailey and Ang Pasang; at 6:24 am Schlimme and with Tashi Tshering and Mingma Tenzing. Rice and Dawa Nuru to ABC at 1:30 pm, Dailey and Pasang Nuru to C2 at 8:30 am, Schlimme and 2 Sherpas C2 9:30 am. Sherpa summiters: Tashi Tshering, Pangboche, 18/6/70, Everest X10, Cho Oyu X1 Ang Pasang, Pangboche, Everest X4, Cho Oyu X2 Dawa Nuru, aka Danura, Phortse, Everest X4, Cho Oyu X4, Manaslu X1 Mingma Tenzing, Phortse, 1/6/86, 1st 8000er Oxygen: Hamill with chest infection from C2 to ABC on 25 Sept Summiters: all 3 members in C3, from C3 to top to C2. Dailey and Schlimme in C2 in descent. Rice stopped used at C2's altitude and went on down without it. Sherpas used none at all.
Accidents	Hamill chest infection in C2; Boersma exhausted and left 19 Sept (C1 only)
Achievement	-
Agency	Great Escapes Trekking
Commercial Route	True
Standard Route	True
Primary Route	False
Primary Member	False
Primary Reference	False
Primary ID	-
Checksum	2458654
Year	2004
Summit Success	True
O2 Summary	Used
Route (lowercase)	nw side

Members

Field	Value
ID	36156
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY04338
Member ID	02
Peak ID	CHOY
Year	2004
Season	3
First Name	Larry Lyckle
Last Name	Boersma
Sex	M
Age	0
Birth Date	-
Year of Birth	1930
Calculated Age	74
Citizenship	USA
Status	Climber
Residence	Corvallis, Oregon
Occupation	University professor of soil sciences
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	7
HCN	0
Checksum	2424152
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	larry lyckle boersma
Year of Birth	1930
Year	2004
Age at Expedition	74
Role	Member

Field	Value
ID	36157
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY04338
Member ID	03
Peak ID	CHOY
Year	2004
Season	3
First Name	Shannon Bruce
Last Name	Dailey
Sex	M
Age	0
Birth Date	-
Year of Birth	1971
Calculated Age	33
Citizenship	USA
Status	Climber
Residence	Greenwich, Connecticut
Occupation	Attorney
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	2004-09-26
Summit Date 2	-
Summit Date 3	-
Summit Time 1	0545
Summit Time 2	-
Summit Time 3	-
Route 1	1
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	True
O2 None	False
O2 Climb	True
O2 Descent	False
O2 Sleep	True
O2 Medical	False
O2 Notes	In C3, from C3 to top to C2, in C2 in descent
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	2438985
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	shannon bruce dailey
Year of Birth	1971
Year	2004
Age at Expedition	33
Role	Member

Field	Value
ID	36158
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY04338
Member ID	01
Peak ID	CHOY
Year	2004
Season	3
First Name	Michael Aaron
Last Name	Hamill
Sex	M
Age	0
Birth Date	-
Year of Birth	1977
Calculated Age	27
Citizenship	USA
Status	Leader
Residence	Hanover, New Hampshire
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	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	False
Personal High Point (m)	7000
Summit Date 1	2004-09-17
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	0
Ascent 2	0
Ascent 3	0
O2 Used	True
O2 None	False
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	True
O2 Notes	From C2 to ABC on 25th Sept
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	2
Summit Term	9
HCN	0
Checksum	2441366
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	michael aaron hamill
Year of Birth	1977
Year	2004
Age at Expedition	27
Role	Leader

Field	Value
ID	36159
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY04338
Member ID	04
Peak ID	CHOY
Year	2004
Season	3
First Name	Nicholas Alexander (Nick)
Last Name	Rice
Sex	M
Age	0
Birth Date	-
Year of Birth	1985
Calculated Age	19
Citizenship	USA
Status	Climber
Residence	Hermosa Beach, California
Occupation	Student
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	False
High Point (m)	True
Personal High Point (m)	8188
Summit Date 1	2004-09-26
Summit Date 2	-
Summit Date 3	-
Summit Time 1	0615
Summit Time 2	-
Summit Time 3	-
Route 1	1
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	True
O2 None	False
O2 Climb	True
O2 Descent	False
O2 Sleep	True
O2 Medical	False
O2 Notes	In C3, from C3 to top to C2
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	2444079
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	nicholas alexander (nick) rice
Year of Birth	1985
Year	2004
Age at Expedition	19
Role	Member

Field	Value
ID	36160
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY04338
Member ID	05
Peak ID	CHOY
Year	2004
Season	3
First Name	David E. (Dave)
Last Name	Schlimme
Sex	M
Age	0
Birth Date	-
Year of Birth	1962
Calculated Age	41
Citizenship	USA
Status	Climber
Residence	Malvern, Pennsylvania
Occupation	Property manager
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	2004-09-26
Summit Date 2	-
Summit Date 3	-
Summit Time 1	0624
Summit Time 2	-
Summit Time 3	-
Route 1	1
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	True
O2 None	False
O2 Climb	True
O2 Descent	True
O2 Sleep	True
O2 Medical	False
O2 Notes	In C3, from C3 to top to C2, in C2 in descent
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	2435922
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	david e. (dave) schlimme
Year of Birth	1962
Year	2004
Age at Expedition	42
Role	Member

Field	Value
ID	36161
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY04338
Member ID	09
Peak ID	CHOY
Year	2004
Season	3
First Name	Tashi Tshering
Last Name	Sherpa
Sex	M
Age	0
Birth Date	-
Year of Birth	1970
Calculated Age	34
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	2004-09-26
Summit Date 2	-
Summit Date 3	-
Summit Time 1	0624
Summit Time 2	-
Summit Time 3	-
Route 1	1
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	2nd ascent of Cho Oyu
Necrology	-
Summit Bid	5
Summit Term	1
HCN	0
Checksum	2438639
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	tashi tshering sherpa
Year of Birth	1970
Year	2004
Age at Expedition	34
Role	Hired

Field	Value
ID	36162
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY04338
Member ID	06
Peak ID	CHOY
Year	2004
Season	3
First Name	Ang Pasang
Last Name	Sherpa
Sex	M
Age	0
Birth Date	-
Year of Birth	1966
Calculated Age	38
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	2004-09-26
Summit Date 2	-
Summit Date 3	-
Summit Time 1	0545
Summit Time 2	-
Summit Time 3	-
Route 1	1
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	3rd ascent of Cho Oyu
Necrology	-
Summit Bid	5
Summit Term	1
HCN	0
Checksum	2437116
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	ang pasang sherpa
Year of Birth	1966
Year	2004
Age at Expedition	38
Role	Hired

Field	Value
ID	36163
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY04338
Member ID	07
Peak ID	CHOY
Year	2004
Season	3
First Name	Dawa Nuru (Danuru)
Last Name	Sherpa
Sex	M
Age	0
Birth Date	-
Year of Birth	1978
Calculated Age	25
Citizenship	Nepal
Status	H-A Worker
Residence	Phortse, 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	2004-09-26
Summit Date 2	-
Summit Date 3	-
Summit Time 1	0615
Summit Time 2	-
Summit Time 3	-
Route 1	1
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	5th ascent of Cho Oyu; brother of Panuru Sherpa (Phortse)
Necrology	-
Summit Bid	5
Summit Term	1
HCN	0
Checksum	2441744
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	dawa nuru (danuru) sherpa
Year of Birth	1978
Year	2004
Age at Expedition	26
Role	Hired

Field	Value
ID	36164
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY04338
Member ID	08
Peak ID	CHOY
Year	2004
Season	3
First Name	Mingma Tenzing
Last Name	Sherpa
Sex	M
Age	0
Birth Date	-
Year of Birth	1986
Calculated Age	18
Citizenship	Nepal
Status	H-A Worker
Residence	Phortse, 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	2004-09-26
Summit Date 2	-
Summit Date 3	-
Summit Time 1	0624
Summit Time 2	-
Summit Time 3	-
Route 1	1
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	1st 8000er
Necrology	-
Summit Bid	5
Summit Term	1
HCN	0
Checksum	2444511
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	mingma tenzing sherpa
Year of Birth	1986
Year	2004
Age at Expedition	18
Role	Hired

9 recorded members.

Name	Sex	Year of Birth	Citizenship	Status	Residence	Occupation
Larry Lyckle Boersma	M	1930	USA	Climber	Corvallis, Oregon	University professor of soil sciences	Details Other expeditions
Shannon Bruce Dailey	M	1971	USA	Climber	Greenwich, Connecticut	Attorney	Details Other expeditions
Michael Aaron Hamill	M	1977	USA	Leader	Hanover, New Hampshire	Alpine guide	Details Other expeditions
Nicholas Alexander (Nick) Rice	M	1985	USA	Climber	Hermosa Beach, California	Student	Details Other expeditions
David E. (Dave) Schlimme	M	1962	USA	Climber	Malvern, Pennsylvania	Property manager	Details Other expeditions
Tashi Tshering Sherpa	M	1970	Nepal	H-A Worker	Pangboche, Khumbu	-	Details Other expeditions
Ang Pasang Sherpa	M	1966	Nepal	H-A Worker	Pangboche, Khumbu	-	Details Other expeditions
Dawa Nuru (Danuru) Sherpa	M	1978	Nepal	H-A Worker	Phortse, Khumbu	-	Details Other expeditions
Mingma Tenzing Sherpa	M	1986	Nepal	H-A Worker	Phortse, Khumbu	-	Details Other expeditions

References

Field	Value
ID	7646
Imported	2026-03-06 18:06:36.307770
Expedition ID	CHOY04338
Reference ID	01
Year	2004
Type	5
Journal	-
Author	-
Title	http://www.mountainguides.com/04cho-oyu/index.html
Publisher	-
Publication Date	-
Language	-
Citation	-
Yak 94	-
Notes	-

1 recorded references.

Expedition ID	Journal	Author	Title	Publisher	Citation	Yak 94
CHOY04338	-	-	http://www.mountainguides.com/04cho-oyu/index.html	-	-	-