> For the complete documentation index, see [llms.txt](https://docs.mapbox.com/mapbox-gl-js/llms.txt)
# Query terrain elevation
This example uses [`queryTerrainElevation`](https://docs.mapbox.com/mapbox-gl-js/api/map/#map#queryterrainelevation) to display the elevation of a pin which follows a path.
It implements [ES6 `async` functions](https://developer.mozilla.org/en-US/docs/Learn/JavaScript/Asynchronous/Async_await) to increase readability of asynchronous code.
> Example code:
**JavaScript**
```html
Query terrain elevation
```