> For the complete documentation index, see [llms.txt](https://help.backtrackmaps.com/backtrack-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.backtrackmaps.com/backtrack-docs/mapping/layers/slope-angle.md).

# Slope Angle

Identify avalanche prone terrain.

### Slope shading

Visualize slopes with high avalanche hazard. Slope angle ranges are color coded according to the legend below.

{% hint style="success" %}
**Supported Platforms**

Desktop

Mobile (iOS & Android)
{% endhint %}

<figure><img src="https://1588017020-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FrwRXkjdZS4xacoTceKjy%2Fuploads%2FWuBDquhug5xQXKMHfh0d%2FSlope%20Angle%20Legend.jpg?alt=media&amp;token=ad9d0a7d-8e5d-4c11-9957-43d220d905fe" alt="" width="360"><figcaption></figcaption></figure>

{% tabs %}
{% tab title="Desktop" %}
You can customize the color scheme by clicking on a segment of the legend.

<figure><img src="https://1588017020-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FrwRXkjdZS4xacoTceKjy%2Fuploads%2FynmB4rLKhHP3i3AP5V6z%2FSlope%20Angle%20(Web).jpg?alt=media&amp;token=1c45049f-5288-4e04-a9c8-455f1cd674b8" alt=""><figcaption></figcaption></figure>
{% endtab %}

{% tab title="Mobile" %}

<figure><img src="https://1588017020-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FrwRXkjdZS4xacoTceKjy%2Fuploads%2FQOEw2QSjBoylVvwqPdiQ%2FSlope%20Angle%20(Mobile).jpg?alt=media&amp;token=41d8cd3d-77b4-4709-a230-7f60786adfae" alt="" width="375"><figcaption></figcaption></figure>
{% endtab %}
{% endtabs %}

### Slope highlight

Highlight a specific slope angle range. This is useful for finding slopes in your target angle, i.e. 20-30º for low angle days. Or for highlighting flat areas to avoid.

{% hint style="success" %}
**Supported Platforms**

Desktop

Mobile
{% endhint %}

<figure><img src="https://1588017020-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FrwRXkjdZS4xacoTceKjy%2Fuploads%2FPZDiWq3dLtmcA6sInzea%2FSlope%20Angle%20Highlight%20(Web).jpg?alt=media&amp;token=88d5b6be-eebd-43b1-b21a-78f54b6420d7" alt=""><figcaption></figcaption></figure>

### Data source

This layer is produced using the highest resolution data available, including LiDAR at 1m resolution covering most of the US.

{% hint style="danger" %}
Slope angle is not a perfect indicator of avalanche potential. It's always possible that the angle has been underestimated, or that the actual angle is steeper on small, localized slopes. Always verify angles with a slope meter, and seek proper education before venturing into avalanche terrain.
{% endhint %}