Yellowstone Caldera
The Yellowstone Caldera is a large volcanic collapse structure within Yellowstone National Park in the United States.
Also known as: Yellowstone supervolcano caldera
How big is it?
70 km · approximate long axis
Also 43.5 mi
Approximate long axis · approximate
Typical recorded range: 65 km to 75 km.
A little perspective
Yellowstone Caldera vs One-hour drive at 100 km/h: length comparison
The distance of a one-hour drive at 100 km/h is about 1.43 times the long axis of the Yellowstone Caldera.
The Yellowstone Caldera is a large volcanic collapse structure within Yellowstone National Park in the United States.
A one-hour drive at a set speed is the distance a vehicle travels in one hour of uninterrupted motion.
Both rulers start at the same zero and share one linear scale. Artwork keeps its original proportions. A ruler represents the selected distance or a measurement not visible in this view.
Measurements, assumptions & sources +
Yellowstone Caldera
Approximate long axis: 70 km; approximate; range 65 km–75 km.
Yellowstone’s youngest caldera is approximately 70 km by 45 km. The measured lines are broad map-scale axes, not a surveyed rim or hiking route.
The marked approximate long axis is calibrated. Unmeasured illustration details are representative.
One-hour drive at 100 km/h
Distance: 100 km; example.
A defined distance at a constant speed, excluding delays.
Defined examples — our methodology
The marked distance is calibrated. Unmeasured illustration details are representative.
Use the visual comparison to explore its scale, then check the measurements and sources.
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Why this measurement?
Why we use 70 km
We compare the long axis of the Yellowstone Caldera. This is an estimate; check the notes for its rounding and uncertainty. The recorded range is 65 km to 75 km.
Yellowstone’s youngest caldera is approximately 70 km by 45 km. The measured lines are broad map-scale axes, not a surveyed rim or hiking route.
The marked horizontal span follows the measured feature, not the edges of the image. How calibrated comparisons work →
Recorded properties
Dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 70 km | 65 km to 75 km | approximate | |
| 45 km | 40 km to 50 km | approximate |
Around this scale
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Want to check the number?
The source records and measurement method remain available for inspection.
- USGS — Yellowstone calderaApproximate 70 by 45 kilometre dimensions of the youngest Yellowstone caldera.
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