Peaks
Lobuche East
USA 1984 SE Ridge expedition
Lobuche East | 1984 SE Ridge
A USA expedition to Lobuche East in 1984 via SE Ridge, led by Larry Nielson.
Summit reached on 25th April 1984.
3 members recorded.
Expedition Details
Field
Value
ID
1036
Imported
2026-03-06 18:04:49.359634
Expedition ID
LOBE84101
Peak ID
LOBE
Year
1984
Season
1
Host Country
1
Route 1
SE Ridge
Route 2
-
Route 3
-
Route 4
-
Nationality
USA
Leaders
Larry Nielson
Sponsor
-
Success 1
True
Success 2
False
Success 3
False
Success 4
False
Ascent 1
4th
Ascent 2
-
Ascent 3
-
Ascent 4
-
Claimed
False
Disputed
False
Countries
-
Approach
-
Basecamp Date
1984-04-19
Summit Date
1984-04-25
Summit Time
1130
Summit Days
6
Total Days
6
Termination Date
1984-04-25
Termination Reason
1
Termination Notes
-
High Point (m)
6119
Traverse
False
Ski
False
Paraglide
False
Camps
0
Fixed Rope (m)
0
Total Members
2
Summit Members
1
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(19/04,5180m),Smt(25/04)
Route Notes
BC at lake between point 5551m & pt 5245m which appears to be normal site.
Just below highest of 3 summits is big crevasse and then knife-edged where a fall would be fatal. Nielson reported it was extremely techically difficult with possible break of knife-edge. No evidence of anyone on previous attempts had passed crevasse - hard ice requiring ice axes. Nielson protected Gyaltzen who joined him on top (Gyaltzen had gone high on Everest with Nielson). Route to ridge also dangerous from avalanching.
Accidents
Torobin had ear infection that upset his balance & kept him from climbing
Achievement
-
Agency
-
Commercial Route
-
Standard Route
-
Primary Route
False
Primary Member
False
Primary Reference
-
Primary ID
-
Checksum
2448655
Year
1984
Summit Success
True
O2 Summary
None
Route (lowercase)
se ridge
Members
Field
Value
ID
16716
Imported
2026-03-06 18:06:05.675609
Expedition ID
LOBE84101
Member ID
01
Peak ID
LOBE
Year
1984
Season
1
First Name
Lawrence Darius (Larry)
Last Name
Nielson
Sex
M
Age
0
Birth Date
-
Year of Birth
1947
Calculated Age
36
Citizenship
USA
Status
Leader
Residence
Olympia, Washington
Occupation
Teacher (8th grade)
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)
6119
Summit Date 1
1984-04-25
Summit Date 2
-
Summit Date 3
-
Summit Time 1
1130
Summit Time 2
-
Summit Time 3
-
Route 1
1
Route 2
0
Route 3
0
Ascent 1
4
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
2430484
Summit Note 1
-
Summit Note 2
-
Summit Note 3
-
Death Route
-
Name (lowercase)
lawrence darius (larry) nielson
Year of Birth
1947
Year
1984
Age at Expedition
37
Role
Leader
Field
Value
ID
16717
Imported
2026-03-06 18:06:05.675609
Expedition ID
LOBE84101
Member ID
02
Peak ID
LOBE
Year
1984
Season
1
First Name
Leonard B.
Last Name
Torobin
Sex
M
Age
0
Birth Date
-
Year of Birth
1931
Calculated Age
52
Citizenship
USA
Status
Climber
Residence
Atlanta, Georgia
Occupation
Chairman of materials technology corporation
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
True
Injury Date
-
Injury Time
-
Injury Type
10
Injury Height (m)
0
Death Notes
Could not go above high camp due to ear infection
Member Notes
-
Necrology
-
Summit Bid
1
Summit Term
9
HCN
0
Checksum
2424570
Summit Note 1
-
Summit Note 2
-
Summit Note 3
-
Death Route
-
Name (lowercase)
leonard b. torobin
Year of Birth
1931
Year
1984
Age at Expedition
53
Role
Member
Field
Value
ID
16718
Imported
2026-03-06 18:06:05.675609
Expedition ID
LOBE84101
Member ID
03
Peak ID
LOBE
Year
1984
Season
1
First Name
Ang Gyaltsen
Last Name
Sherpa
Sex
M
Age
0
Birth Date
-
Year of Birth
-
Calculated Age
0
Citizenship
Nepal
Status
H-A Worker
Residence
-
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)
6119
Summit Date 1
1984-04-25
Summit Date 2
-
Summit Date 3
-
Summit Time 1
1130
Summit Time 2
-
Summit Time 3
-
Route 1
1
Route 2
0
Route 3
0
Ascent 1
4
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
-82
Summit Note 1
-
Summit Note 2
-
Summit Note 3
-
Death Route
-
Name (lowercase)
ang gyaltsen sherpa
Year of Birth
-
Year
1984
Age at Expedition
-
Role
Hired
3 recorded members.
References
Field
Value
ID
32
Imported
2026-03-06 18:06:36.307770
Expedition ID
LOBE84101
Reference ID
01
Year
1984
Type
2
Journal
AAJ
Author
Nielson, Lawrence
Title
-
Publisher
-
Publication Date
1985
Language
-
Citation
59:269 (1985)
Yak 94
-
Notes
-
Field
Value
ID
4142
Imported
2026-03-06 18:06:36.307770
Expedition ID
LOBE84101
Reference ID
02
Year
1984
Type
3
Journal
MM
Author
-
Title
-
Publisher
-
Publication Date
1984
Language
-
Citation
99:9 (Sep 1984)
Yak 94
-
Notes
-
Field
Value
ID
12586
Imported
2026-03-06 18:06:36.307770
Expedition ID
LOBE84101
Reference ID
03
Year
1984
Type
5
Journal
-
Author
-
Title
http://publications.americanalpineclub.org/articles/12198525701/Asia-Nepal-Lhotse-Shar-Southwest-Face
Publisher
-
Publication Date
-
Language
-
Citation
-
Yak 94
-
Notes
-
3 recorded references.