Cho Oyu | 1998 NW side

A USA expedition to Cho Oyu in 1998 via NW side, led by Scott Woolums. Summit reached on 28th September 1998. 6 members recorded.

Expedition Details

Field	Value
ID	3118
Imported	2026-03-06 18:04:49.359634
Expedition ID	CHOY98307
Peak ID	CHOY
Year	1998
Season	3
Host Country	2
Route 1	NW side
Route 2	-
Route 3	-
Route 4	-
Nationality	USA
Leaders	Scott Woolums
Sponsor	American Cho Oyu - Autumn 98
Success 1	True
Success 2	False
Success 3	False
Success 4	False
Ascent 1	315
Ascent 2	-
Ascent 3	-
Ascent 4	-
Claimed	False
Disputed	False
Countries	-
Approach	-
Basecamp Date	1998-09-05
Summit Date	1998-09-28
Summit Time	1100
Summit Days	23
Total Days	30
Termination Date	1998-10-05
Termination Reason	1
Termination Notes	-
High Point (m)	8188
Traverse	False
Ski	False
Paraglide	False
Camps	3
Fixed Rope (m)	0
Total Members	5
Summit Members	1
Member Deaths	0
Total Hired	2
Summit Hired	0
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(05/09),ABC(10/09,5700m),C1(15/09,6400m),C2(20/09,7000m),C3(27/09,7400m),Smt(28/09)
Route Notes	C3 reached by Marshall, Shin and Woolums; got to C3 on 27th and next morning Shin didn't feel well and went down with a Sherpa. Marshall, Woolums, and Rinzi (from Kharikhola) up towards top. Left C3 at 2:20 NST, got stuck behind OTT party in queue at rock band at about 7500m. Marshall and Rinzi to shoulder at 7800m+ but Marshall felt altitude affecting him and both down to C3 while Woolums broke trail to top which reached about 11:00 am NST, joined Marshall and Rinzi at C3 and all 3 down to C2 for night (Woolums helped OTT's Foster descend). Woolums used oxygen in queue and later breaking trail and kept it on at top and in descent till gave it to Foster.
Accidents	Nothing serious
Achievement	-
Agency	Nepal Myths & Mountain Trails
Commercial Route	True
Standard Route	True
Primary Route	False
Primary Member	False
Primary Reference	-
Primary ID	-
Checksum	2456863
Year	1998
Summit Success	True
O2 Summary	Used
Route (lowercase)	nw side

Members

Field	Value
ID	22512
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY98307
Member ID	02
Peak ID	CHOY
Year	1998
Season	3
First Name	Philip S.
Last Name	Marshall
Sex	M
Age	0
Birth Date	-
Year of Birth	1951
Calculated Age	46
Citizenship	USA
Status	Climber
Residence	Fairbanks, Alaska
Occupation	School teacher
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)	7800
Summit Date 1	1998-09-28
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	4
Summit Term	6
HCN	0
Checksum	2431870
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	philip s. marshall
Year of Birth	1951
Year	1998
Age at Expedition	47
Role	Member

Field	Value
ID	22513
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY98307
Member ID	03
Peak ID	CHOY
Year	1998
Season	3
First Name	Michael
Last Name	Richardson
Sex	M
Age	0
Birth Date	-
Year of Birth	1960
Calculated Age	37
Citizenship	USA
Status	Climber
Residence	Bristol, Florida
Occupation	Marine engineer
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)	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	2435175
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	michael richardson
Year of Birth	1960
Year	1998
Age at Expedition	38
Role	Member

Field	Value
ID	22514
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY98307
Member ID	04
Peak ID	CHOY
Year	1998
Season	3
First Name	Peter Sung-Ho
Last Name	Shin
Sex	M
Age	0
Birth Date	-
Year of Birth	1972
Calculated Age	26
Citizenship	USA
Status	Climber
Residence	Los Angeles, 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	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	False
Personal High Point (m)	7400
Summit Date 1	1998-09-27
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	3
Summit Term	6
HCN	0
Checksum	2439290
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	peter sung-ho shin
Year of Birth	1972
Year	1998
Age at Expedition	26
Role	Member

Field	Value
ID	22515
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY98307
Member ID	05
Peak ID	CHOY
Year	1998
Season	3
First Name	Roger J.
Last Name	Siglin
Sex	M
Age	0
Birth Date	-
Year of Birth	1936
Calculated Age	62
Citizenship	USA
Status	Climber
Residence	Fairbanks, Alaska
Occupation	Retired
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)	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	2426220
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	roger j. siglin
Year of Birth	1936
Year	1998
Age at Expedition	62
Role	Member

Field	Value
ID	22516
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY98307
Member ID	01
Peak ID	CHOY
Year	1998
Season	3
First Name	Charles Scott
Last Name	Woolums
Sex	M
Age	0
Birth Date	-
Year of Birth	1957
Calculated Age	41
Citizenship	USA
Status	Leader
Residence	Hood River, Oregon
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	1998-09-28
Summit Date 2	-
Summit Date 3	-
Summit Time 1	1100
Summit Time 2	-
Summit Time 3	-
Route 1	1
Route 2	0
Route 3	0
Ascent 1	315
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	On summit day
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	2433984
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	charles scott woolums
Year of Birth	1957
Year	1998
Age at Expedition	41
Role	Leader

Field	Value
ID	47476
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY98307
Member ID	06
Peak ID	CHOY
Year	1998
Season	3
First Name	Pemba Rinzi/Rinji
Last Name	Sherpa
Sex	M
Age	0
Birth Date	-
Year of Birth	1974
Calculated Age	23
Citizenship	Nepal
Status	H-A Worker
Residence	Kharikhola, Solukhumbu
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	False
High Point (m)	False
Personal High Point (m)	7800
Summit Date 1	1998-09-28
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	4
Summit Term	14
HCN	0
Checksum	2440285
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	pemba rinzi/rinji sherpa
Year of Birth	1974
Year	1998
Age at Expedition	24
Role	Hired

6 recorded members.

Name	Sex	Year of Birth	Citizenship	Status	Residence	Occupation
Philip S. Marshall	M	1951	USA	Climber	Fairbanks, Alaska	School teacher	Details Other expeditions
Michael Richardson	M	1960	USA	Climber	Bristol, Florida	Marine engineer	Details Other expeditions
Peter Sung-Ho Shin	M	1972	USA	Climber	Los Angeles, California	Student	Details Other expeditions
Roger J. Siglin	M	1936	USA	Climber	Fairbanks, Alaska	Retired	Details Other expeditions
Charles Scott Woolums	M	1957	USA	Leader	Hood River, Oregon	Alpine guide	Details Other expeditions
Pemba Rinzi/Rinji Sherpa	M	1974	Nepal	H-A Worker	Kharikhola, Solukhumbu	-	Details Other expeditions

References

0 recorded references.