Cho Oyu | 2005 NW side

A Germany expedition to Cho Oyu in 2005 via NW side, led by Dirk Groeger. Summit reached on 26th September 2005. 10 members recorded.

Expedition Details

Field	Value
ID	5047
Imported	2026-03-06 18:04:49.359634
Expedition ID	CHOY05316
Peak ID	CHOY
Year	2005
Season	3
Host Country	2
Route 1	NW side
Route 2	-
Route 3	-
Route 4	-
Nationality	Germany
Leaders	Dirk Groeger
Sponsor	Amical Alpin Cho Oyu Expedition 2005
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	Austria, Italy, Switzerland
Approach	Kodari->Tingri
Basecamp Date	2005-09-02
Summit Date	2005-09-26
Summit Time	0845
Summit Days	24
Total Days	28
Termination Date	2005-09-30
Termination Reason	1
Termination Notes	-
High Point (m)	8188
Traverse	False
Ski	False
Paraglide	False
Camps	3
Fixed Rope (m)	100
Total Members	9
Summit Members	7
Member Deaths	0
Total Hired	1
Summit Hired	1
Hired Deaths	0
No Hired	False
O2 Used	False
O2 None	True
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Taken	False
O2 Unknown	False
Other Summits	-
Campsites	BC(02/09,4900m),ABC(05/09,5700m),C1(13/09,6400m),C2(18/09,7100m),C3(25/09,7400m),Smt(26/09)
Route Notes	Team left C3 at 3:30 am, spent about half an hour on summit and got back to C2 at 12:30 pm. Studer and Groeger descended to C1 and got there at 5 pm. Summit times 8:45-10:00 NST. Raisch used Todd's oxygen from C3 down to 7800m. He climbed with Pasang Dawa from Pangboche (5X Everest, 4X Cho Oyu) who works for Henry Todd. Bolay got to Yellow Band but turned around due to exhaustion. Czerny went back to KTM on 4 Sept as he was not feeling well.
Accidents	-
Achievement	-
Agency	Thamserku Trekking
Commercial Route	True
Standard Route	True
Primary Route	False
Primary Member	False
Primary Reference	False
Primary ID	-
Checksum	2459065
Year	2005
Summit Success	True
O2 Summary	None
Route (lowercase)	nw side

Members

Field	Value
ID	38525
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY05316
Member ID	01
Peak ID	CHOY
Year	2005
Season	3
First Name	Dirk
Last Name	Groeger
Sex	M
Age	0
Birth Date	-
Year of Birth	1963
Calculated Age	42
Citizenship	Germany
Status	Leader
Residence	Munich, Bavaria, Germany
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	2005-09-26
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	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	5
Summit Term	1
HCN	0
Checksum	2436118
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	dirk groeger
Year of Birth	1963
Year	2005
Age at Expedition	42
Role	Leader

Field	Value
ID	38526
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY05316
Member ID	02
Peak ID	CHOY
Year	2005
Season	3
First Name	Eberhard Rudolf
Last Name	Bolay
Sex	M
Age	0
Birth Date	-
Year of Birth	1949
Calculated Age	55
Citizenship	Germany
Status	Climber
Residence	Reutlingen, Baden-Wuerttemberg, Germany
Occupation	University lecturer in educational 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)	7500
Summit Date 1	2005-09-26
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	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	4
Summit Term	7
HCN	0
Checksum	2431228
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	eberhard rudolf bolay
Year of Birth	1949
Year	2005
Age at Expedition	56
Role	Member

Field	Value
ID	38527
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY05316
Member ID	03
Peak ID	CHOY
Year	2005
Season	3
First Name	Stefan
Last Name	Czerny
Sex	M
Age	0
Birth Date	-
Year of Birth	1975
Calculated Age	29
Citizenship	Austria
Status	Climber
Residence	Vienna, Austria
Occupation	Attorney
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	6
HCN	0
Checksum	2440781
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	stefan czerny
Year of Birth	1975
Year	2005
Age at Expedition	30
Role	BC Only

Field	Value
ID	38528
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY05316
Member ID	04
Peak ID	CHOY
Year	2005
Season	3
First Name	Guenther
Last Name	Hofer
Sex	M
Age	0
Birth Date	-
Year of Birth	1960
Calculated Age	45
Citizenship	Italy
Status	Climber
Residence	Deutschnofen, Bolzano, Italy
Occupation	Local government
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	2005-09-26
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	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	5
Summit Term	1
HCN	0
Checksum	2434882
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	guenther hofer
Year of Birth	1960
Year	2005
Age at Expedition	45
Role	Member

Field	Value
ID	38529
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY05316
Member ID	05
Peak ID	CHOY
Year	2005
Season	3
First Name	Johann
Last Name	Hofer
Sex	M
Age	0
Birth Date	-
Year of Birth	1963
Calculated Age	42
Citizenship	Italy
Status	Climber
Residence	Lana, Bolzano, Italy
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	False
High Point (m)	True
Personal High Point (m)	8188
Summit Date 1	2005-09-26
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	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	5
Summit Term	1
HCN	0
Checksum	2436011
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	johann hofer
Year of Birth	1963
Year	2005
Age at Expedition	42
Role	Member

Field	Value
ID	38530
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY05316
Member ID	06
Peak ID	CHOY
Year	2005
Season	3
First Name	Klaas
Last Name	Koehne
Sex	M
Age	0
Birth Date	-
Year of Birth	1965
Calculated Age	40
Citizenship	Germany
Status	Climber
Residence	Muenster, North Rhine-Westphalia, Germany
Occupation	Teacher of math, physics and geography
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	2005-09-26
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	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	5
Summit Term	1
HCN	0
Checksum	2436758
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	klaas koehne
Year of Birth	1965
Year	2005
Age at Expedition	40
Role	Member

Field	Value
ID	38531
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY05316
Member ID	07
Peak ID	CHOY
Year	2005
Season	3
First Name	Guenther
Last Name	Pixner
Sex	M
Age	0
Birth Date	-
Year of Birth	1969
Calculated Age	35
Citizenship	Italy
Status	Climber
Residence	Lana, Bolzano, Italy
Occupation	Sales clerk
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	2005-09-26
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	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	5
Summit Term	1
HCN	0
Checksum	2438447
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	guenther pixner
Year of Birth	1969
Year	2005
Age at Expedition	36
Role	Member

Field	Value
ID	38532
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY05316
Member ID	08
Peak ID	CHOY
Year	2005
Season	3
First Name	Heinz
Last Name	Raisch
Sex	M
Age	0
Birth Date	-
Year of Birth	1943
Calculated Age	61
Citizenship	Germany
Status	Climber
Residence	Baden-Wuerttemberg, Germany
Occupation	Structural engineer
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	2005-09-26
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	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	5
Summit Term	1
HCN	0
Checksum	2428974
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	heinz raisch
Year of Birth	1943
Year	2005
Age at Expedition	62
Role	Member

Field	Value
ID	38533
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY05316
Member ID	09
Peak ID	CHOY
Year	2005
Season	3
First Name	Michael
Last Name	Studer
Sex	M
Age	0
Birth Date	-
Year of Birth	1981
Calculated Age	24
Citizenship	Switzerland
Status	Climber
Residence	Valais, Switzerland
Occupation	Machine designer
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	2005-09-26
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	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	5
Summit Term	1
HCN	0
Checksum	2442639
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	michael studer
Year of Birth	1981
Year	2005
Age at Expedition	24
Role	Member

Field	Value
ID	38534
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY05316
Member ID	10
Peak ID	CHOY
Year	2005
Season	3
First Name	Chuldim
Last Name	Sherpa
Sex	M
Age	0
Birth Date	-
Year of Birth	1971
Calculated Age	34
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	2005-09-26
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	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	7th ascent of Cho Oyu; brother of Sona Dendu
Necrology	-
Summit Bid	5
Summit Term	1
HCN	0
Checksum	2439128
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	chuldim sherpa
Year of Birth	1971
Year	2005
Age at Expedition	34
Role	Hired

10 recorded members.

Name	Sex	Year of Birth	Citizenship	Status	Residence	Occupation
Dirk Groeger	M	1963	Germany	Leader	Munich, Bavaria, Germany	Alpine guide	Details Other expeditions
Eberhard Rudolf Bolay	M	1949	Germany	Climber	Reutlingen, Baden-Wuerttemberg, Germany	University lecturer in educational sciences	Details Other expeditions
Stefan Czerny	M	1975	Austria	Climber	Vienna, Austria	Attorney	Details Other expeditions
Guenther Hofer	M	1960	Italy	Climber	Deutschnofen, Bolzano, Italy	Local government	Details Other expeditions
Johann Hofer	M	1963	Italy	Climber	Lana, Bolzano, Italy	Alpine guide	Details Other expeditions
Klaas Koehne	M	1965	Germany	Climber	Muenster, North Rhine-Westphalia, Germany	Teacher of math, physics and geography	Details Other expeditions
Guenther Pixner	M	1969	Italy	Climber	Lana, Bolzano, Italy	Sales clerk	Details Other expeditions
Heinz Raisch	M	1943	Germany	Climber	Baden-Wuerttemberg, Germany	Structural engineer	Details Other expeditions
Michael Studer	M	1981	Switzerland	Climber	Valais, Switzerland	Machine designer	Details Other expeditions
Chuldim Sherpa	M	1971	Nepal	H-A Worker	Khumjung, Khumbu	-	Details Other expeditions

References

Field	Value
ID	7815
Imported	2026-03-06 18:06:36.307770
Expedition ID	CHOY05316
Reference ID	01
Year	2005
Type	5
Journal	-
Author	-
Title	http://www.amical.de
Publisher	-
Publication Date	-
Language	-
Citation	-
Yak 94	-
Notes	-

1 recorded references.

Expedition ID	Journal	Author	Title	Publisher	Citation	Yak 94
CHOY05316	-	-	http://www.amical.de	-	-	-