SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/ski-symbol-double-black

What do two black diamonds side by side on a trail sign mean?

Most difficult, use extra caution.

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  1. Most difficult, use extra caution ✔
  2. Slightly harder than blue
  3. Terrain park ahead

Why: Double diamonds are for expert skiers and riders. Steeper, tighter, and often with obstacles.

Huh, didn't know that: A single black diamond means Most Difficult, and the double diamond adds extra caution.

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References

Answer: Most difficult, use extra caution. Double diamonds are for expert skiers and riders. Steeper, tighter, and often with obstacles.

  1. NSAA Ski Safety U.S.: Know Before You Go (Trail Signage) skisafety.us/know-before-you-go
    Double-Black Diamond: Most Difficult, use extra caution
    Checked 2026-10-11.
  2. PNSAA: Trail Signage pnsaa.org/safety/trail-signage
    Before you ride a lift during make sure you can handle the trails at the top.
    Checked 2026-10-11.

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