In Western Colorado, riding in the mountains is something we do all the time. However, normally we have at least 2 wheels underneath us. Two German extreme athletes have eliminated one of those wheels. 

Here is the description from their YouTube channel of Stephanie Dietze and Lutz Eichholz.

Stephanie Dietze and Lutz Eichholz unicycling down a 3011m high mountain in the dolomites. Every meter off the descent challenged the athletes to there limits and mistakes where often not allowed to be sure not to fall down big cliffs or slopes.

They're not kidding. And, they've done it all over the world including the Alps.

And Iran.

Looking over their travels, I don't see any activity in our area. Perhaps, we should extend an invitation?