Late last May, Bene Mayr and Markus Eder took on a project two years in the making: a strenuous, road-gapping descent of the Stelvio Pass on the Swiss-Italian border. Ever since Mayr first saw the endless switchbacks of this classic Alpine pass, he’d dreamed of building a road gap course down it. Finally, in spring 2018 the project neared its completion—only for the course to nearly be destroyed by wet spring weather. With snow melting and time of the essence, Mayr and Markus Eder stepped up to bag this daunting, 555-meter vertical run, skiing grass, rocks and dirt to get the job done.

Head on over to the Red Bull website to see more behind-the-scenes footage from the Stelvio Pass road gaps project.