The Tour du Mont Blanc is also home to what type of annual race?

Here is the question :

THE TOUR DU MONT BLANC IS ALSO HOME TO WHAT TYPE OF ANNUAL RACE?

Here is the option for the question :

Horseback
Running
Cycling
Triathlon

The Answer:

And, the answer for the the question is :

Running

Explanation:

[STC0012229]. Some explorers find that simply hiking through Western Europe’s Alps isn’t enough; the 105-mile Tour du Mont Blanc trail hosts a grueling annual footrace. The Ultra-Trail du Mont-Blanc (UTMB) attracts more than 2,000 runners from around the world every August. Mont Blanc, the tallest mountain in the Alps, is the focus of this hike.