Cho Oyu | 2007 NW side

A USA expedition to Cho Oyu in 2007 via NW side, led by Ryan Waters. Summit reached on 20th September 2007. 8 members recorded.

Expedition Details

Field	Value
ID	5795
Imported	2026-03-06 18:04:49.359634
Expedition ID	CHOY07346
Peak ID	CHOY
Year	2007
Season	3
Host Country	2
Route 1	NW side
Route 2	-
Route 3	-
Route 4	-
Nationality	USA
Leaders	Ryan Waters
Sponsor	Rainier Mountaineering (RMI) Cho Oyu Expedition 2007
Success 1	False
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	2007-09-11
Summit Date	2007-09-20
Summit Time	-
Summit Days	9
Total Days	19
Termination Date	2007-09-30
Termination Reason	4
Termination Notes	Abandoned at 7100m due to bad weather
High Point (m)	7100
Traverse	False
Ski	False
Paraglide	False
Camps	2
Fixed Rope (m)	0
Total Members	6
Summit Members	0
Member Deaths	0
Total Hired	2
Summit Hired	0
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	True
O2 Unknown	False
Other Summits	-
Campsites	BC(11/09),ABC(13/09,5600m),C1(16/09,6800m),C2(20/09,7100m),xxx(20/09,7100m)
Route Notes	Went to C2 on 20th for acclimatization with no intention of going on up to the summit from there at that time. 21st to ABC to rest for summit push. 25th from ABC to C1. Strong wind that night that blew away some team's tents, so down to ABC on 26th. Hansen left 27th (missed his family and felt not worth staying longer in uncertain weather). Cann stayed at BC (tired). On 28th Grom, Waters, Britton, Pospischil and Karsang Namgyal went to C1, but wind screaming and so down to ABC same day and climb finished. Sherpas: Karsang Namgyal, 24/8/71, Thami, Cho Oyu X7, Everest X7 Son Dorje, 22/5/63, Phortse, Everest X4
Accidents	-
Achievement	-
Agency	Mountain Experience
Commercial Route	True
Standard Route	True
Primary Route	False
Primary Member	False
Primary Reference	False
Primary ID	-
Checksum	2459881
Year	2007
Summit Success	False
O2 Summary	None
Route (lowercase)	nw side

Members

Field	Value
ID	43459
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY07346
Member ID	03
Peak ID	CHOY
Year	2007
Season	3
First Name	Michael D.
Last Name	Brittin
Sex	M
Age	0
Birth Date	-
Year of Birth	1952
Calculated Age	54
Citizenship	USA
Status	Climber
Residence	Mclean, Virginia
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	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	True
Personal High Point (m)	7100
Summit Date 1	2007-09-20
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	1
Summit Term	3
HCN	0
Checksum	2432183
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	michael d. brittin
Year of Birth	1952
Year	2007
Age at Expedition	55
Role	Member

Field	Value
ID	43460
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY07346
Member ID	04
Peak ID	CHOY
Year	2007
Season	3
First Name	Lawrence Brad
Last Name	Cann
Sex	M
Age	0
Birth Date	-
Year of Birth	1952
Calculated Age	55
Citizenship	USA
Status	Climber
Residence	Richmond, Virginia
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	7
HCN	0
Checksum	2432018
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	lawrence brad cann
Year of Birth	1952
Year	2007
Age at Expedition	55
Role	BC Only

Field	Value
ID	43461
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY07346
Member ID	02
Peak ID	CHOY
Year	2007
Season	3
First Name	Casey Aaron
Last Name	Grom
Sex	M
Age	0
Birth Date	-
Year of Birth	1974
Calculated Age	33
Citizenship	USA
Status	Deputy Leader
Residence	Ashford, Washington
Occupation	Alpine guide
Leader	False
Deputy	True
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)	6800
Summit Date 1	2007-09-28
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	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	3
HCN	0
Checksum	2440169
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	casey aaron grom
Year of Birth	1974
Year	2007
Age at Expedition	33
Role	Deputy

Field	Value
ID	43462
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY07346
Member ID	05
Peak ID	CHOY
Year	2007
Season	3
First Name	Jon Steven
Last Name	Hansen
Sex	M
Age	0
Birth Date	-
Year of Birth	1957
Calculated Age	49
Citizenship	USA
Status	Climber
Residence	Wautoma, Wisconsin
Occupation	Businessman
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)	True
Personal High Point (m)	7100
Summit Date 1	2007-09-20
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	1
Summit Term	18
HCN	0
Checksum	2434020
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	jon steven hansen
Year of Birth	1957
Year	2007
Age at Expedition	50
Role	Member

Field	Value
ID	43463
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY07346
Member ID	06
Peak ID	CHOY
Year	2007
Season	3
First Name	Robert R.
Last Name	Pospischil
Sex	M
Age	0
Birth Date	-
Year of Birth	1948
Calculated Age	59
Citizenship	USA
Status	Climber
Residence	Nesconet, New York
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)	True
Personal High Point (m)	7100
Summit Date 1	2007-09-20
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	1
Summit Term	3
HCN	0
Checksum	2430689
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	robert r. pospischil
Year of Birth	1948
Year	2007
Age at Expedition	59
Role	Member

Field	Value
ID	43464
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY07346
Member ID	01
Peak ID	CHOY
Year	2007
Season	3
First Name	Ryan Powers
Last Name	Waters
Sex	M
Age	0
Birth Date	-
Year of Birth	1973
Calculated Age	34
Citizenship	USA
Status	Leader
Residence	Boulder, Colorado
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)	True
Personal High Point (m)	7100
Summit Date 1	2007-09-20
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	1
Summit Term	3
HCN	0
Checksum	2439803
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	ryan powers waters
Year of Birth	1973
Year	2007
Age at Expedition	34
Role	Leader

Field	Value
ID	43465
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY07346
Member ID	07
Peak ID	CHOY
Year	2007
Season	3
First Name	Karsang Namgyal/Namgel
Last Name	Sherpa
Sex	M
Age	0
Birth Date	-
Year of Birth	1971
Calculated Age	36
Citizenship	Nepal
Status	H-A Worker
Residence	Thami, 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	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	True
Personal High Point (m)	7100
Summit Date 1	2007-09-20
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	(1971-2012) Died 18 April 2012 at Everest BC from non-AMS illness
Summit Bid	1
Summit Term	3
HCN	0
Checksum	2439071
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	karsang namgyal/namgel sherpa
Year of Birth	1971
Year	2007
Age at Expedition	36
Role	Hired

Field	Value
ID	43466
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY07346
Member ID	08
Peak ID	CHOY
Year	2007
Season	3
First Name	Son Dorje
Last Name	Sherpa
Sex	M
Age	0
Birth Date	-
Year of Birth	1963
Calculated Age	44
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	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	True
Personal High Point (m)	7100
Summit Date 1	2007-09-20
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	1
Summit Term	3
HCN	0
Checksum	2436063
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	son dorje sherpa
Year of Birth	1963
Year	2007
Age at Expedition	44
Role	Hired

8 recorded members.

Name	Sex	Year of Birth	Citizenship	Status	Residence	Occupation
Michael D. Brittin	M	1952	USA	Climber	Mclean, Virginia	Attorney	Details Other expeditions
Lawrence Brad Cann	M	1952	USA	Climber	Richmond, Virginia	Attorney	Details Other expeditions
Casey Aaron Grom	M	1974	USA	Deputy Leader	Ashford, Washington	Alpine guide	Details Other expeditions
Jon Steven Hansen	M	1957	USA	Climber	Wautoma, Wisconsin	Businessman	Details Other expeditions
Robert R. Pospischil	M	1948	USA	Climber	Nesconet, New York	Business executive	Details Other expeditions
Ryan Powers Waters	M	1973	USA	Leader	Boulder, Colorado	Alpine guide	Details Other expeditions
Karsang Namgyal/Namgel Sherpa	M	1971	Nepal	H-A Worker	Thami, Khumbu	-	Details Other expeditions
Son Dorje Sherpa	M	1963	Nepal	H-A Worker	Phortse, Khumbu	-	Details Other expeditions

References

0 recorded references.