Cho Oyu | 2006 NW side

A USA expedition to Cho Oyu in 2006 via NW side, led by Christine Boskoff. Summit reached on 1st October 2006. 5 members recorded.

Expedition Details

Field	Value
ID	5518
Imported	2026-03-06 18:04:49.359634
Expedition ID	CHOY06361
Peak ID	CHOY
Year	2006
Season	3
Host Country	2
Route 1	NW side
Route 2	-
Route 3	-
Route 4	-
Nationality	USA
Leaders	Christine Boskoff
Sponsor	Mountain Madness Cho Oyu Expedition 2006
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	Germany
Approach	Zangmu->Nyalam->Tingri->BC
Basecamp Date	2006-09-03
Summit Date	2006-10-01
Summit Time	0745
Summit Days	28
Total Days	32
Termination Date	2006-10-05
Termination Reason	1
Termination Notes	-
High Point (m)	8188
Traverse	False
Ski	False
Paraglide	False
Camps	3
Fixed Rope (m)	0
Total Members	4
Summit Members	4
Member Deaths	0
Total Hired	1
Summit Hired	1
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(03/09,4900m),ABC(07/09,5700m),C1(14/09,6400m),C2(19/09,7100m),C3(30/09,7400m),Smt(01/10)
Route Notes	BC at CBC/IC on 6 Sept at 5300m. Boskoff, Dalzell, Payne, Riehle and Maila left C3 at 01:15 hours (NST), summited at 07:45 hours, stayed on summit 30 minutes, descended to C2 at 15:00 hours. Next day to ABC. Clear weather but cold. The climbers had beautiful view of Everest. The expedition returned to Kathmandu on Oct 6 and will leave on 8 Oct. "Sherpa": Maila Tamang, Kavre
Accidents	-
Achievement	-
Agency	Mountain Madness
Commercial Route	True
Standard Route	True
Primary Route	False
Primary Member	False
Primary Reference	False
Primary ID	-
Checksum	2459481
Year	2006
Summit Success	True
O2 Summary	Used
Route (lowercase)	nw side

Members

Field	Value
ID	41301
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY06361
Member ID	01
Peak ID	CHOY
Year	2006
Season	3
First Name	Christine Joyce Feld
Last Name	Boskoff
Sex	F
Age	0
Birth Date	-
Year of Birth	1967
Calculated Age	39
Citizenship	USA
Status	Leader
Residence	Norwood, Colorado
Occupation	Owner of business organizing & conducting climbing expeditions
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	2006-10-01
Summit Date 2	-
Summit Date 3	-
Summit Time 1	0745
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	False
O2 Medical	False
O2 Notes	From C3 to smt to C3
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	(1954-2006) Died Nov 2006 as result of climbing accident in Sichuan, China
Summit Bid	5
Summit Term	1
HCN	0
Checksum	2437648
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	christine joyce feld boskoff
Year of Birth	1967
Year	2006
Age at Expedition	39
Role	Leader

Field	Value
ID	41302
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY06361
Member ID	02
Peak ID	CHOY
Year	2006
Season	3
First Name	Eric Lane
Last Name	Dalzell
Sex	M
Age	0
Birth Date	-
Year of Birth	1983
Calculated Age	23
Citizenship	USA
Status	Climber
Residence	Seattle, Washington
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	-
High Point (m)	True
Personal High Point (m)	8188
Summit Date 1	2006-10-01
Summit Date 2	-
Summit Date 3	-
Summit Time 1	0745
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	False
O2 Medical	False
O2 Notes	From C3 to smt to C3
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	2443348
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	eric lane dalzell
Year of Birth	1983
Year	2006
Age at Expedition	23
Role	Member

Field	Value
ID	41303
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY06361
Member ID	03
Peak ID	CHOY
Year	2006
Season	3
First Name	Mark Scott
Last Name	Payne
Sex	M
Age	0
Birth Date	-
Year of Birth	1959
Calculated Age	46
Citizenship	USA
Status	Climber
Residence	Blooming Field, Delaware
Occupation	Biochemist
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	2006-10-01
Summit Date 2	-
Summit Date 3	-
Summit Time 1	0745
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	False
O2 Medical	False
O2 Notes	From C3 to smt to C3
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	2434782
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	mark scott payne
Year of Birth	1959
Year	2006
Age at Expedition	47
Role	Member

Field	Value
ID	41304
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY06361
Member ID	04
Peak ID	CHOY
Year	2006
Season	3
First Name	Wolf Juergen
Last Name	Riehle
Sex	M
Age	0
Birth Date	-
Year of Birth	1963
Calculated Age	43
Citizenship	Germany
Status	Climber
Residence	Ketchem, Idaho
Occupation	Bakery owner
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	2006-10-01
Summit Date 2	-
Summit Date 3	-
Summit Time 1	0745
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	False
O2 Medical	False
O2 Notes	From C3 to smt to C3
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	2436068
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	wolf juergen riehle
Year of Birth	1963
Year	2006
Age at Expedition	43
Role	Member

Field	Value
ID	41305
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY06361
Member ID	05
Peak ID	CHOY
Year	2006
Season	3
First Name	Maila
Last Name	Tamang
Sex	M
Age	0
Birth Date	-
Year of Birth	1967
Calculated Age	39
Citizenship	Nepal
Status	H-A Worker
Residence	Narayanthan-6, Kavre
Occupation	-
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	True
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	2006-10-01
Summit Date 2	-
Summit Date 3	-
Summit Time 1	0745
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	False
O2 Medical	False
O2 Notes	From C3 to smt to C3
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	-2093
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	maila tamang
Year of Birth	1967
Year	2006
Age at Expedition	39
Role	Hired

5 recorded members.

Name	Sex	Year of Birth	Citizenship	Status	Residence	Occupation
Christine Joyce Feld Boskoff	F	1967	USA	Leader	Norwood, Colorado	Owner of business organizing & conducting climbing expeditions	Details Other expeditions
Eric Lane Dalzell	M	1983	USA	Climber	Seattle, Washington	Student	Details Other expeditions
Mark Scott Payne	M	1959	USA	Climber	Blooming Field, Delaware	Biochemist	Details Other expeditions
Wolf Juergen Riehle	M	1963	Germany	Climber	Ketchem, Idaho	Bakery owner	Details Other expeditions
Maila Tamang	M	1967	Nepal	H-A Worker	Narayanthan-6, Kavre	-	Details Other expeditions

References

Field	Value
ID	7603
Imported	2026-03-06 18:06:36.307770
Expedition ID	CHOY06361
Reference ID	01
Year	2006
Type	5
Journal	-
Author	-
Title	http://www.mountainmadness.com/newsroom/newsroom.cfm?dis_id=26
Publisher	-
Publication Date	-
Language	-
Citation	-
Yak 94	-
Notes	-

1 recorded references.

Expedition ID	Journal	Author	Title	Publisher	Citation	Yak 94
CHOY06361	-	-	http://www.mountainmadness.com/newsroom/newsroom.cfm?dis_id=26	-	-	-