This Trophy / Achievement is obtained once you’ve performed a 150m slide in the snow. The best place to do this is in Norway, and more specifically on the side of a mountain located south of Fannaraki Summit, as shown in the screenshot below. All you need to do is approach the edge of the snowy slope to begin the slide, then manoeuvre around any objects including rocks and animals, to avoid being stopped. By the end of the slope you will have slid at least 150m, and probably a bit more, thereby unlocking the trophy.

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(1 of 3) The top of the slope in the mountainside, where you can begin sliding down.