Racetrack Playa
E46667
Racetrack Playa is a dry lakebed in Death Valley National Park famous for its mysteriously moving "sailing stones" that leave long tracks across the cracked desert surface.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Racetrack Playa canonical | 8 |
| sliding rocks of Racetrack Playa | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T255232 — 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: Racetrack Playa Context triple: [Death Valley, contains, Racetrack Playa]
-
A.
Soda Dry Lake
Soda Dry Lake is a dry lake bed in California’s Mojave Desert, known for its stark salt flats and proximity to the former health resort site of Zzyzx.
-
B.
Bonneville Salt Flats
The Bonneville Salt Flats are a vast, densely packed salt pan in northwestern Utah famous for land speed racing and their stark, otherworldly landscape.
-
C.
Black Rock Desert
Black Rock Desert is a remote, arid playa in northwestern Nevada known for its vast alkali flats, stark landscapes, and as the longtime site of the Burning Man festival.
-
D.
Antelope Valley
Antelope Valley is a high-desert region in Southern California known for its poppy fields, aerospace industry presence, and location at the western edge of the Mojave Desert.
-
E.
El Mirage Dry Lake
El Mirage Dry Lake is a dry lakebed in California known for its vast, flat playa used for land-speed racing, off-highway recreation, and film production within the Mojave Desert.
- 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: Racetrack Playa Target entity description: Racetrack Playa is a dry lakebed in Death Valley National Park famous for its mysteriously moving "sailing stones" that leave long tracks across the cracked desert surface.
-
A.
Soda Dry Lake
Soda Dry Lake is a dry lake bed in California’s Mojave Desert, known for its stark salt flats and proximity to the former health resort site of Zzyzx.
-
B.
Bonneville Salt Flats
The Bonneville Salt Flats are a vast, densely packed salt pan in northwestern Utah famous for land speed racing and their stark, otherworldly landscape.
-
C.
Black Rock Desert
Black Rock Desert is a remote, arid playa in northwestern Nevada known for its vast alkali flats, stark landscapes, and as the longtime site of the Burning Man festival.
-
D.
Antelope Valley
Antelope Valley is a high-desert region in Southern California known for its poppy fields, aerospace industry presence, and location at the western edge of the Mojave Desert.
-
E.
El Mirage Dry Lake
El Mirage Dry Lake is a dry lakebed in California known for its vast, flat playa used for land-speed racing, off-highway recreation, and film production within the Mojave Desert.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
dry lakebed
ⓘ
geological formation ⓘ playa ⓘ |
| access | via Racetrack Valley Road ⓘ |
| bestObservationCondition | after rare precipitation events ⓘ |
| bestObservationSeason | winter ⓘ |
| climate |
desert
ⓘ
extremely arid ⓘ |
| elevation | approximately 1130 meters above sea level ⓘ |
| famousFor |
mysteriously moving rocks
ⓘ
sailing stones that leave long tracks ⓘ |
| geologicalProcess |
episodic flooding
ⓘ
evaporation leaving clay-rich surface ⓘ |
| hasNearbyFeature |
The Grandstand
ⓘ
Ubehebe Crater (regional access point) ⓘ
linked to:
Ubehebe Crater
|
| hasNotableFeature |
sailing stones
ⓘ
stone tracks ⓘ |
| hasOfficialProtection | National Park Service management ⓘ |
| hazard |
extreme heat in warmer months
ⓘ
tire damage risk on access road ⓘ |
| length | approximately 4.5 kilometers ⓘ |
| liesAtBaseOf | Cottonwood Mountains ⓘ |
| locatedIn |
California
ⓘ
linked to:
California, United States
Death Valley National Park ⓘ
linked to:
Death Valley National Park (partial)
Inyo County, California ⓘ United States ⓘ
linked to:
United States of America
|
| movementExplanation |
rock motion occurs when playa is wet and partially frozen
ⓘ
thin ice sheets driven by light winds move rocks across wet playa surface ⓘ |
| nameOrigin | elongated, track-like shape of the playa ⓘ |
| partOf |
Basin and Range Province
ⓘ
Panamint Mountains ⓘ
linked to:
Panamint Range
|
| photographyInterest | landscape photography ⓘ |
| protectedAreaStatus | within a U.S. national park ⓘ |
| requiresVehicleType | high-clearance vehicle recommended ⓘ |
| roadType | unimproved gravel road ⓘ |
| rockComposition | mainly dolomite and syenite ⓘ |
| rockSource | surrounding hills and outcrops ⓘ |
| scientificInterest |
geomorphology research
ⓘ
study of natural rock motion ⓘ |
| shape | elongated oval ⓘ |
| subjectToRegulation |
driving on playa surface is prohibited
ⓘ
removal of rocks is prohibited ⓘ |
| surfaceType |
mud-cracked clay
ⓘ
playa sediment ⓘ |
| tourismType | geotourism destination ⓘ |
| trackOrientation | often roughly parallel ⓘ |
| trackPattern | long, straight or curving furrows in playa surface ⓘ |
| width | approximately 2 kilometers ⓘ |
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: Racetrack Playa Description of subject: Racetrack Playa is a dry lakebed in Death Valley National Park famous for its mysteriously moving "sailing stones" that leave long tracks across the cracked desert surface.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.