Horseshoe Lake
E65219
Horseshoe Lake is a scenic alpine lake near Mammoth Lakes, California, known for its striking mountain views, recreational trails, and unusual tree die-off linked to elevated carbon dioxide emissions from the ground.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Horseshoe Lake canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T420346 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Horseshoe Lake Context triple: [Mammoth Lakes area, hasAttraction, Horseshoe Lake]
-
A.
Walker Lake
Walker Lake is a large natural desert lake in western Nevada known for its shrinking water levels and importance as a habitat for migratory birds and native fish.
-
B.
Peach Lake
Peach Lake is a small hamlet in the Town of Southeast in Putnam County, New York, known for the lake that shares its name and its residential, lakeside character.
-
C.
Caples Lake
Caples Lake is a high-elevation reservoir in the Sierra Nevada of California, popular for fishing, boating, and hiking in an alpine setting.
-
D.
Woods Lake
Woods Lake is a scenic alpine lake in the Sierra Nevada of California, popular for camping, fishing, and hiking in the Carson Pass area.
-
E.
Thompson Lake
Thompson Lake is a scenic freshwater lake in southwestern Maine known for its clear waters, recreational boating, and fishing opportunities.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Horseshoe Lake Target entity description: Horseshoe Lake is a scenic alpine lake near Mammoth Lakes, California, known for its striking mountain views, recreational trails, and unusual tree die-off linked to elevated carbon dioxide emissions from the ground.
-
A.
Walker Lake
Walker Lake is a large natural desert lake in western Nevada known for its shrinking water levels and importance as a habitat for migratory birds and native fish.
-
B.
Peach Lake
Peach Lake is a small hamlet in the Town of Southeast in Putnam County, New York, known for the lake that shares its name and its residential, lakeside character.
-
C.
Caples Lake
Caples Lake is a high-elevation reservoir in the Sierra Nevada of California, popular for fishing, boating, and hiking in an alpine setting.
-
D.
Woods Lake
Woods Lake is a scenic alpine lake in the Sierra Nevada of California, popular for camping, fishing, and hiking in the Carson Pass area.
-
E.
Thompson Lake
Thompson Lake is a scenic freshwater lake in southwestern Maine known for its clear waters, recreational boating, and fishing opportunities.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
alpine lake
ⓘ
natural lake ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| causeOfTreeDieOff | elevated carbon dioxide in soil gas ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| elevation | approximately 2700 meters above sea level ⓘ |
| geologicalSetting |
Long Valley Caldera
ⓘ
surface form:
Long Valley Caldera region
|
| hasAccess | paved road from Mammoth Lakes town ⓘ |
| hasFeature |
forested shoreline
ⓘ
sandy beach areas ⓘ volcanic soils ⓘ |
| hasHazard |
high soil carbon dioxide concentrations
ⓘ
tree mortality from CO2 exposure ⓘ |
| hasMountainRange | Sierra Nevada ⓘ |
| hasNearbyAttraction |
Lake George, New York
ⓘ
surface form:
Lake George
Lake Mary ⓘ Twin Lakes ⓘ
surface form:
Twin Lakes (Mammoth Lakes Basin)
|
| hasNearbyCity |
Mammoth Lakes area
ⓘ
surface form:
Mammoth Lakes, California
|
| hasRecreationActivity |
dog walking
ⓘ
fishing ⓘ hiking ⓘ picnicking ⓘ trail running ⓘ |
| hasSeasonalUse | primarily summer recreation ⓘ |
| hasTrail | loop trails around the lake ⓘ |
| hasUseRestriction | areas closed or restricted due to CO2 hazards ⓘ |
| hasVegetationIssue | large area of dead and dying trees ⓘ |
| hasViewOf | Mammoth Crest ⓘ |
| hasWarningSignage | advisories about carbon dioxide hazards ⓘ |
| knownFor |
elevated carbon dioxide emissions from the ground
ⓘ
recreational trails ⓘ scenic mountain views ⓘ tree die-off ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
Inyo National Forest ⓘ Mammoth Lakes area ⓘ
surface form:
Mammoth Lakes, California
Mono County, California ⓘ United States of America ⓘ
surface form:
United States
|
| locatedOn | eastern slope of the Sierra Nevada ⓘ |
| management |
U.S. Forest Service
ⓘ
surface form:
United States Forest Service
|
| monitoredBy | United States Geological Survey ⓘ |
| near |
Earthquake Fault area near Mammoth Lakes
ⓘ
Mammoth Mountain Ski Area ⓘ
surface form:
Mammoth Mountain
|
| partOf |
Mammoth Lakes area
ⓘ
surface form:
Mammoth Lakes Basin
|
| region |
Eastern Sierra
ⓘ
surface form:
Eastern Sierra Nevada
|
| waterType | freshwater ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Horseshoe Lake Description of subject: Horseshoe Lake is a scenic alpine lake near Mammoth Lakes, California, known for its striking mountain views, recreational trails, and unusual tree die-off linked to elevated carbon dioxide emissions from the ground.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.